CN85103430A - Measuring motion - Google Patents
Measuring motion Download PDFInfo
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- CN85103430A CN85103430A CN85103430.6A CN85103430A CN85103430A CN 85103430 A CN85103430 A CN 85103430A CN 85103430 A CN85103430 A CN 85103430A CN 85103430 A CN85103430 A CN 85103430A
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- elongated slot
- survey
- orientation tool
- assembly
- erecting frame
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
Be installed in accurately and permanently for ease of measuring motion on the equipment such as lathe, have in this device and movably survey an elongated slot and an adjustable assembly, surveying elongated slot has the spheroid that engages with the shell type erecting frame with orientation tool at relative two ends.During use, by the removable lid on the erecting frame opening surface, supporting ball and cover are clamped.In installation, erecting frame is connected with orientation tool and gets along well and survey the elongated slot connection, and ball and cover can be for the direction of the mobile.Erecting frame is fixed on the lathe.Assembly is fixed on facing on the fixed mount of surveying elongated slot.One adjustable mechanism allows the slide head of an assembly to take on the axial direction mobile at the base that is vertically fixed on the frame.
Description
Relate generally to of the present invention is equipped with a magnetic scale, the measuring motion of optical scale or similarity piece, and more particularly, this invention relates to one can assemble easily, also is easily mounted on monitored lathe or other measuring motions mechanically.
In prior art, magnetic scale and optical scale, other measuring motions of past direct sum are applied in the digital machine control together.Common rule is packed on the lathe by a base, this has just produced problem in the maintenance of measuring motion and displacement, for instance, all must be after pulling down measuring motion from lathe again through overregulating calibration at every turn, regulate calibration normally with selecting measuring appliance (Pick-tester) and trimmer or the like to carry out, be the calibration just accurately of looking for the truth simultaneously, it also is more time-consuming adjusting.Moreover when on lathe measuring motion being installed, the inevitable distortion and the bending that cause on the survey elongated slot in also will manufacturing with the pad compensation usually are so the adjusting of general measuring motion is very thorny.
In addition, when on the lathe assembly fixture, assembling an assembly (head assembly) of measuring motion, under common measuring motion situation, run into the other problem again, the general technology of assembly head assembly is to adjust the vertical height of the load bearing component of head with respect to assembly fixture with pad on assembly fixture, is very limited and adjust assembly with pad with respect to the setting range of assembly fixture, this just require to adjust user one side assembly fixture height.
Therefore, the object of the present invention is to provide the measuring motion of assembling and being easy to be installed on lathe or the similar machine.
Of the present invention another more specifically purpose the measuring motion that provides one to have assembly is provided, this assembly has a substructure member to be packed in and to use the equipment of measuring motion to be relatively fixed on the frame, utilizes base to do locational adjustment by correct assembly.
The measuring motion that provides one to have survey elongated slot (scale Channel) is provided a further object of the present invention, when this survey elongated slot is installed on the equipment, adjust accurately because of the dimensional discrepancy of being out of shape and/or bending produces in can making by compensation.
In order to finish aforementioned and some other purpose, the present invention is realized by following mode: measuring motion has a kind of adjustment facility or mechanism, it can provide the space adjustability with respect to the equipment that measuring motion is installed, and the adjustment machine comprises that one can be to make the element that the space is adjusted with respect to the mating surface of equipment.
Adjustable adjustment element is a part of surveying a long assembly, and it can for example do vertical moving to the erecting frame that stretches out from equipment with respect to the mating surface of equipment.Another kind method is adjusted element and can be equipped with the bulbous end member at the two ends of the survey elongated slot of installation head assembly.The bulbous end member combines with the installation component that orientation tool accurately is installed on the equipment, orientation tool is the same long with the survey elongated slot basically, engaging and can throw off between bulbous end member and corresponding installation component so just can be pulled down the survey elongated slot, and be pulled down installation component on the need slave unit.
Such adjusting mechanism facility measuring motion the location of equipment is adjusted.Particularly, engage the adjustment of the long assembly of survey of erecting frame and the distance between the erecting frame and do not need to use pad having surveyed vertically moving adjustment member facility on the long assembly.In addition, when surveying a long assembly and must unload, this joint that can free between bulbous end member and installation component has kept realizing the accuracy of the location of the installation component on the equipment by means of orientation tool.
According to an aspect of invention, measuring motion comprises a survey stock (Scalerod), and a stature assembly is installed in also to survey with stock on the fixed component frame and interrelates, and can move along surveying stock again, is being parallel to the displacement of surveying measurement mobile object on the stock direction; Survey elongated slot for one, its support to be surveyed stock and is fixed on movably on the object, one is used for determining an assembly and surveys the detent mechanism of elongated slot with respect to the position of mobile object and fixed component, the latter's feature is, orientation tool is independent of an assembly at least and surveys one of elongated slot, thereby accurate the adjustment done in the position of object and/or fixed component so that one of an assembly and survey elongated slot can move, another feature is exactly that orientation tool is equipped with fastened tools and places restrictions on an assembly and survey one of elongated slot with respect to the moving of orientation tool, so that keep an assembly and survey one of elongated slot should have on the position with respect to moving object and/or fixed component.
According to another aspect of invention, measuring motion be installed in equipment for example the step that comprises of the method on lathe or the similar machine be:
The survey elongated slot and the measuring motion that comprise a stature assembly and predetermined length and reservation shape are arranged are provided;
Provide and to be engaged in a pair of erecting frame of surveying elongated slot two vertical two ends;
Provide one practically identical in the orientation tool of surveying the elongated slot degree.It also has and is applicable to measuring motion and locatees the plane of orientation that the respective face with fixed component matches in the above.
Erecting frame is bonded on orientation tool two vertically holds, and determine the position of erecting frame with respect to fixed frame by orientation tool;
Installing component is fixed on the fixed component, and its fixed position is determined by previous step;
Pull down orientation tool from the installing component that is fixed on the fixed component, install and survey elongated slot, vertical two ends that survey is grown grass are connected on the installing component.
Another aspect of invention is installed in measuring motion on the equipment, and for example the step that comprises of lathe or similar mechanically method is:
One of a pair of erecting frame is installed on first object, the two ends at orientation tool identical with the survey elongated slot of a component part of the measuring motion of last completion on the size and dimension are connected on each erecting frame so that pounding the interval that remains on a regular length;
Position on first object at the erecting frame fixed length interval place of definite remainder, and a remaining erecting frame is fixed on first object.
On erecting frame, unload orientation tool;
Join on the erecting frame surveying the relative two ends of elongated slot;
Erecting frame is connected on two vertical ends of orientation tool, and determines the position of erecting frame with respect to fixed component by orientation tool;
On the position that previous step is determined, installing component is fixed on the fixed component; At last remove orientation tool from the installing component that is packed on the fixed component again, install and survey elongated slot, its vertical end is connected on the installing component.
Other purposes that the present invention finishes and advantage will have been known from following detailed explanation.
From the accompanying drawing of following detailed explanation and optimum implementation of the present invention, will understand the present invention more fully,, the present invention is not limited to described optimum implementation, and the preferred plan of being lifted only is in order to explain and to understand and a kind of scheme of proposing here.
The drawing explanation of accompanying drawing:
Fig. 1 is the skeleton view according to measuring motion optimum implementation of the present invention;
Fig. 2 is the figure view identical with Fig. 1, and it is surveyed the elongated slot lid and removes to go out the connection between slider head and the survey stock;
Fig. 3 is the square section of III-III line in Fig. 2;
Fig. 4 is the survey elongated slot of measuring motion optimum implementation of Fig. 1 and the skeleton view of relevant part;
Fig. 5 is the profile along Fig. 4 V-whole survey elongated slot that the V line is got;
Fig. 6 is the survey elongated slot side VII figure that looks in arrow V 1 in Fig. 5;
Fig. 7 is the survey elongated slot planimetric map of Fig. 4;
Fig. 8 is that a sketch shows how to be installed in the survey elongated slot surveying stock;
Fig. 9 is that a skeleton view shows how to determine to survey the position of elongated slot with respect to equipment with orientation tool;
Figure 10 is the Knock-Down Component skeleton view that an assembly of Fig. 1 measuring motion optimum implementation amplifies;
Figure 11 is the planimetric map that Figure 10 surveys the critical piece of long assembly;
Figure 12 is the skeleton view of critical piece in Figure 11 that the arrow X 11 of Figure 11 is looked;
Figure 13 is the view of critical piece in Figure 11 that the arrow X 11 of Figure 11 is looked;
Figure 14 is a sketch, shows how to adjust the position of an assembly with respect to fixed mount;
Figure 15 is the view along Figure 14 arrow X V.
Be the explanation of optimum implementation of the present invention below.
Referring now to accompanying drawing, particularly Fig. 1 is to Fig. 3, and the measuring motion of optimum implementation of the present invention generally comprises one and surveys elongated slot [20] and the long assembly [100] of survey that is associated with the magnetic survey stock [120] of surveying elongated slot [20].Surveying elongated slot [20] has a pair of installing component [24] and [26], and both are for being fixed on linear device (linear) [10], and for example the moveable base of lathe or similar machinery designs.These two installing components [24] and [coffee 6] be for being placed on exactly after equipment [10] goes up surveying an elongated slot, securely the former is fixed on the latter by orientation tool and goes up and use, and orientation tool will be discussed afterwards.
Survey elongated slot [20] demountable, that be installed on the equipment [10] with installing component [24] and [26] is supporting the long assembly [100] of survey, surveys on the elongated slot [20] for labour contractor's assembly [100] is assemblied in, and an assembly [100] has a slide [104].Assembly [100] is equipped with a slider [106], be connected on the slide [104] by a pair of linking arm [107], slider [106] can be for vertical movement with respect to slide [104], so that carry out the adjustment with respect to the fixed mount [12] near the fixed mount (not shown) the equipment [10].
Magnetic is surveyed stock [120] and is passed facing to detector head [108], the position of watch-dog [10] and the technology that moves be known for people, thereby need not further discussion.
Fig. 4 as shown in Figures 2 and 3, surveys elongated slot [20] and comprises a channel member, two plates [28] and [30] about it has to detailed structure and installation procedure that Fig. 9 shows the survey elongated slot [20] that constitutes an optimum implementation part of the present invention.[28] and [30] be spaced from each other but parallel to each other, having pair of end parts [32] and [34] between two plates [28] and [30] about the relative two ends of survey elongated slot, each of end part [32] and [34] respectively have one basically the parts in foursquare cross section [36] be clipped in up and down between the plate [28] and [30] respective end, two plates [28] and [30] are to be fixed on the parts [36] with bolt [35] up and down, axially stretch out from the outside surface of parts [36] each the end part [32] and [34] that have the outshot [40] of bulbous end [42], the bulbous end [42] of end part [32] and [34] is for being connected (joint) installing component [24] and [26] design, as previously mentioned.
Installing component [24] has an end part [44] to be fixed on the surface of equipment [10] with bolt [46], parts [48] above the end part [44] have a ladder groove, indicate with reference number [50], groove [50] has ladder parts [52] near end part [32], forms the cylinder neck [56] of an opening [54] with the bulbous end [42] of bearing projecting part [40].The major part of groove [50] is born the bulbous end [42] of end part [32], and the termination [58] of a full circle arranged, a cover plate [60] (can tiltedly under) is installed in the upper end of the upper member [48] of installing component [24] by bolt [62], ladder groove [opening 0] with closed upper portion parts [48], the opening [54] of parts [52] is bigger slightly than the neck [56] of projecting part [40], allow installing component [24] and connect with universal joint with respect to surveying elongated slot [20], on the other hand, surveying elongated slot [20] is limited with the axially-movable that upper member [48] limits bulbous end [42] with respect to the axially-movable of installing component [24].
Installing component [26] also has an end part [64] and a upper member [66].Upper member [66] has an axial step groove [68] equally, groove [68] bears the bulbous end [42] of outshot, the upper opening of cover plate [70] sealing groove [68], under this arrangement, survey elongated slot [20] and installing component [26] can be relatively with universal joint handle very skillfully interlink, do not survey moving axially of elongated slot because installing component [26] does not limit, survey elongated slot and can compensate by the bulbous end [42] of outshot [40] and the joint between the installing component [26] in the scale error on the length.
As shown in Figure 7, installing component [24] respectively has a dome side arm to have one tangentially to contact with the vertical engagement arm [14] of equipment [10] with [26], and this just allows installing component [24] and [26] to make level around the elongated slot end and move to pivot surveying.
The orientation tool of indicating with reference number [72] is positioned at upward use of equipment [1 0] to aforesaid survey elongated slot, and this discusses with reference to 8.[72] two axial ends of orientation tool respectively have spherical extension component [74].Those two spherical is to extend the shape that in fact has and the prodger [40] of surveying elongated slot [20] is identical.Orientation tool [72] has as the length of surveying elongated slot.Orientation tool [72] also has profiling shuttle face (Contouring lands) [76] to make reference field to determine to survey the position of elongated slot with respect to the adjacently situated surfaces of equipment [10].
When the survey elongated slot is installed on equipment, at first use orientation tool [72] to make installing component [24] and [26] location, installing component [24] and [26] are mounted to the spherical extension [74] of orientation tool and go up and be fixed on there with cover plate [60] and [70], then, mobile profiling shuttle face [76] makes and equipment, and for example the adjacently situated surfaces of lathe and measuring apparatus or the like contacts.Another kind method, available electric mircrometer gauge or similar device are determined the position of orientation tool [72] with respect to equipment.Curved surface sidewall [24a] must contact with the vertical wall of equipment with [26b], then, and through the end part [44] of installing component [24] and [26] and perforate [46a] the auger shell keyhole on equipment on [64].
In addition, pass through hole [46a] with fastening bolt [46] installing component [24] and [26] are packed on the equipment [10], then,, orientation tool [72] is unloaded down from installing component [24] and [26] by unloading lower cover [60] and [70].In the bulbous end of projecting part [40] [42] is packed into installing component [24] and [26], so just be installed on the equipment surveying elongated slot [20].Under this arrangement, as long as the size of orientation tool is the same long with the survey elongated slot, unloads and install when surveying elongated slot [20] again on each slave unit, just there is no need to redefine its position.This makes the maintenance of surveying elongated slot and changes more or less freely also more convenient.
In aforesaid positioning action, even basic unit's face of the equipment of fixed installation parts [24] and [26] is not parallel to the reference field of orientation tool, small deviation on this angle can be proofreaied and correct by the ball bond between the groove [50] of bulbous end [42] and installing component [24] and [26] and [68].If installing component [24] and one of [26] need become in a level when being packed on the equipment under the inclination angle angle case at its axis and orientation tool axis, installing component guarantee still that with [26b] relative vertical wall with equipment contacts by face sidewall [24].
From knowing understanding here, under aforementioned optimum structure and program, the survey length of measuring motion can be contained on the corresponding site of equipment easily, and can unload down above it easily.
Figure 10 shows an assembly of measuring motion of the optimum implementation of invention to Figure 15, the slide [104] of assembly [100] is assemblied in the inner space of surveying elongated slot, slide [104] is being supported detector head [108] on holding within it, and limited hole [109] extends through detector head [108], and detector head [108] is parallel to the longitudinal axis of surveying elongated slot [20], and positioning element [110] stretches out above slide [104].Positioning element [110] is normally L shaped, comprises that vertical profile [110a] extends upward with the vertical profile upper level childbirth of a horizontal section [110b] from the upper surface of slide [104] to extend.[110c is common to be formed level, and groove [110c] can be connected with the parts of extending [20a] of surveying elongated slot with groove to section [110b].
Survey stock [120] stretching, extension CF and pass through hole [109], pass slide [104] and detector head [108].
Slide [104] also has a pair of threaded hole [114] on the vertical surface near its outer rim, ([118 are screwed into threaded hole [114] is fixed on an end of each linking arm [107] on the vertical surface of slide [104] fastening bolt [116] via packing ring.The other end of connecting wall [107] is fixed on the slider [106] by fastening bolt [121] and packing ring [122].Bolt [121] and packing ring [122] will be twisted tightlyer near the threaded hole and the slide outside at slider edge, and slider also has a horizontally extending main cross sections [106a], pair of holes [106b] is wherein arranged along extending perpendicular to the direction of surveying elongated slot [20] longitudinal axis.
As shown in figure 11, slider [106] has a through hole [124] to extend in parallel along the longitudinal axis of surveying elongated slot, through hole [124] has a circular cross sections, its diameter is greater than the diameter of fastening bolt, the external diameter of pivoting lever [126] is slightly smaller than the internal diameter of through hole [124], and pivoting lever [126] is passed through hole [124].Pivoting lever [126] is not close to through hole so that is formed the annular gap therebetween.There is threaded hole [128] at the two ends of pivoting lever [126], and fastening bolt [121] is screwed into threaded hole [128] other end of linking arm [107] is connected on the slider [106].
Pivoting lever [126] also has a central cross hole [130] to do vertical extension with its longitudinal axis, and the survey wall that gib screw [132] extends through slider [106] enters through hole precession transverse holes with restriction pivoting lever [126] moving with respect to hole [124].The lateral edge of full circle [106c] allows slider [106] to move with respect to pivot.
Under this arrangement situation, slider [106] is to move with respect to the fixed mount [12] of equipment.For example, so that make slider mobile with respect to slide [104], slider [106] is at it and fixed mount [12] end face and can freely moves up and down before flushing, as shown in figure 14 by unscrewing fastening bolt [116] and [121].In addition, go up the accurate adjustment on plane with respect to fixed mount [12], can be undertaken by unscrewing gib screw [132], can make slider mobile like this with respect to pivoting lever [126], this just allows slider to shift to or move apart erecting frame, why possible this level is to moving, and is the elongated pore [106b] owing to slider, and the bolt that slider is fixed on the erecting frame passes this hole.
Therefore, in optimum implementation of the present invention, an assembly also can be contained in easily on the equipment and not need to use pad.
From being well understood to here, the present invention has satisfied the whole purposes and the advantage of seeking here.
Though preferred plan of the present invention is delivered, the present invention can not be understood that to be limited to above-mentioned preferred plan, but comprises all possibility schemes and the remodeling of deriving from the principle of invention, as what proposed in following claims.
Claims (11)
1, measuring motion comprises:
A survey stock;
One stature assembly is installed on the fixed component, and interrelates with this survey stock, can move with measurement along the there again to be parallel to the displacement of moving on this survey stock direction;
Survey elongated slot, supporting this survey stock, and be fixed on this mobile object for one;
Be used for this assembly and this survey elongated slot work important tool with respect to the location of mobile object and fixed component;
The present invention has and is characterised in that, at first is that above-mentioned orientation tool is independent of one of this assembly and this surveys elongated slot at least, and one of this assembly and this survey elongated slot are moved so that do the adjustment of accurate position with respect to this object and/or this fixed component;
Next be this orientation tool be equipped with fastened tools with limit this assembly and this surveys elongated slot the two one of for the moving of this orientation tool so that keep this assembly and this survey elongated slot the two one of with respect to this object and/or this fixed component the position should be arranged.
2, according to the measuring motion described in the claim 1, it is characterized in that, above-mentioned instrument comprises that a pair of installing component is packed on this fixed component, and supporting survey elongated slot, this installing component to allow this survey elongated slot universal joint formula to move the needs that (gimbal displacement) adjusts with respect to this mobile object location for this survey elongated slot removedly.
According to the measuring motion described in the claim 2, it is characterized in that 3, this survey elongated slot has round extension at its vertical two ends, can dismantle ground, pivotally be connected this installing component one of corresponding on, allow this survey elongated slot pivotally move with respect to this installing component.
4, according to the measuring motion described in the claim 3, it is characterized in that, this installing component has a groove, pivotally bear the extension of this full circle, this groove one end opens wide, extension can also be had a lid and be used for sealing this opening end, thereby this extension is remained in this groove from wherein shifting out.
5, according to the measuring motion described in the claim 2 to 4 any one, it is characterized in that, this installing component have a dome vertical wall with this movably the vertical profile of object become tangentially to contact.
6, according to the measuring motion described in the claim 1, it is characterized in that, this orientation tool comprises a slider and separates with this assembly, and there is pivotally connected device to connect this assembly and this slider, this connector can be in this assembly and this slider left-right rotation, and this slider is packed on this fixed component.
According to the measuring motion described in the claim 6, it is characterized in that 7, this connector comprises the hinge instrument, allow slider to do the pivot displacement around the pivot between this connector and this slider.
8, the method for surveying the Chang'an dress is installed, the invention is characterized in, may further comprise the steps:
Provide one to comprise a stature assembly and the measuring motion of surveying elongated slot, this groove has predetermined length and shape;
A pair of erecting frame is provided, can be connected this survey elongated slot two and vertically holds;
An orientation tool is provided, and its length is in fact identical with this survey elongated slot, and has plane of orientation to be suitable for cooperating with the respective planes of fixed component, installs measuring motion on this fixed component;
This erecting frame is connected on two vertical ends of this orientation tool, and determines the position of this erecting frame with respect to this fixed component by this orientation tool;
This installing component is fixed on locational this fixed component of determining in the previous step;
Unload this orientation tool from this installing component that is packed on this fixed component, and this survey elongated slot is installed, vertical end and the installing component of surveying elongated slot link together.
According to the method described in the claim 8, it is characterized in that 9, this installing component moves execution with respect to the location of this first object by making this installing component make pivot about this orientation tool end by orientation tool.
10, according to the method described in the claim 8, it is characterized in that, also be included in the following steps that carry out claim 8 back;
The base of surveying long slider is installed on second object of this object securely, and this slider has one to be movably with respect to this base, and can be packed on relevant any point of this position base scope;
Moving this on the linear axis of motion direction of monitoring perpendicular to measuring motion or the several direction till this is slidably connected to the support member of surveying elongated slot, and this head is being fixed on that position.
11, install and measure the method for the measuring motion that two objects relatively move, the invention is characterized in that included step is:
One of a pair of erecting frame is installed on first object of two articles,
The relative two ends of orientation tool, be connected on each frame of this erecting frame, so that keep the position of erecting frame in regular length.Above-mentioned orientation tool on size and dimension and the survey elongated slot of a part of the measuring motion of last completion be equal to;
Determine the remaining position of an erecting frame on this first object at a fixed length interval place, and an erecting frame of this remainder is fixed on this first object;
Unload this orientation tool from this erecting frame;
The relative two ends of this survey elongated slot are connected on this erecting frame;
This erecting frame is connected two of this orientation tool vertically holds, and determine the position of this erecting frame with respect to this align member by this orientation tool;
This installing component is packed on definite locational this fixed component of abovementioned steps;
Unload this orientation tool from the installing component that is packed on this fixed component, this survey elongated slot is installed, make its vertically being connected on the installing component of end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85103430 CN1008211B (en) | 1985-04-20 | 1985-04-20 | Linear scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85103430 CN1008211B (en) | 1985-04-20 | 1985-04-20 | Linear scale |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85103430A true CN85103430A (en) | 1986-10-15 |
| CN1008211B CN1008211B (en) | 1990-05-30 |
Family
ID=4793183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85103430 Expired CN1008211B (en) | 1985-04-20 | 1985-04-20 | Linear scale |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1008211B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063042A (en) * | 2017-05-17 | 2017-08-18 | 广东鼎科技有限公司 | A kind of measurement apparatus and its application method for ceramic tile membrane equipment |
| CN109211046A (en) * | 2017-07-05 | 2019-01-15 | 株式会社三丰 | Linear scale |
-
1985
- 1985-04-20 CN CN 85103430 patent/CN1008211B/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063042A (en) * | 2017-05-17 | 2017-08-18 | 广东鼎科技有限公司 | A kind of measurement apparatus and its application method for ceramic tile membrane equipment |
| CN107063042B (en) * | 2017-05-17 | 2023-09-08 | 广东一鼎科技有限公司 | Measuring device for ceramic tile film making equipment and using method thereof |
| CN109211046A (en) * | 2017-07-05 | 2019-01-15 | 株式会社三丰 | Linear scale |
| CN109211046B (en) * | 2017-07-05 | 2021-09-14 | 株式会社三丰 | Linear scale |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1008211B (en) | 1990-05-30 |
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