CN105605409A - Step type batten semi-finished product and step type batten thereof - Google Patents
Step type batten semi-finished product and step type batten thereof Download PDFInfo
- Publication number
- CN105605409A CN105605409A CN201610156841.0A CN201610156841A CN105605409A CN 105605409 A CN105605409 A CN 105605409A CN 201610156841 A CN201610156841 A CN 201610156841A CN 105605409 A CN105605409 A CN 105605409A
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- Prior art keywords
- plane
- lath
- notch cuttype
- inclined plane
- connects
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16S—CONSTRUCTIONAL ELEMENTS IN GENERAL; STRUCTURES BUILT-UP FROM SUCH ELEMENTS, IN GENERAL
- F16S3/00—Elongated members, e.g. profiled members; Assemblies thereof; Gratings or grilles
- F16S3/04—Elongated members, e.g. profiled members; Assemblies thereof; Gratings or grilles designed for being joined to similar members in various relative positions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
- B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
- B27M3/08—Manufacture or reconditioning of specific semi-finished or finished articles of specially shaped wood laths or strips
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16S—CONSTRUCTIONAL ELEMENTS IN GENERAL; STRUCTURES BUILT-UP FROM SUCH ELEMENTS, IN GENERAL
- F16S3/00—Elongated members, e.g. profiled members; Assemblies thereof; Gratings or grilles
- F16S3/02—Elongated members, e.g. profiled members; Assemblies thereof; Gratings or grilles composed of two or more elongated members secured together side by side
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
Abstract
The invention discloses a step type batten. A first plane, a second plane, a third plane and a fourth plane on a cross section are parallel to one another. The fourth plane is used as a bottom face. When the fourth plane is a horizontal face, one end of a first inclined face is connected with one end of the fourth plane, the other end of the first inclined face is inclined inwards to extend upwards and connected with one end of the first plane, one end of a second inclined face is connected with the other end of the first plane, the other end of the second inclined face is inclined inwards to extend upwards and connected with one end of the second plane, one end of a third inclined face is connected with the other end of the second plane, the other end of the third inclined face is inclined outwards to extend downwards and connected with one end of the third plane, one end of a fourth inclined face is connected with the other end of the third plane, and the other end of the fourth inclined face is inclined outwards to extend downwards and connected with the other end of the fourth plane. The outturn percentage is improved by changing the shape of the obtained batten. The invention further provides a step type batten semi-finished product.
Description
Technical field
The present invention relates to wood cutting forming field, relate in particular to a kind of notch cuttype lath semi-finished product and rank thereofLadder type lath.
Background technology
Timber is can secondary growing plants, as tree and shrubs, and the lignified tissue forming. ThisA little plants are after primary growth finishes, and the vascular cambium in rhizome comes into play, and outwards develops bast,Inwardly develop timber. Timber is the inside general designation that develops plant tissue of vascular cambium, comprises woodMatter portion and thin-walled ray. Timber plays very large supporting function for human lives.
China per capita occupancy volume of timber is on the low side, and China is huge to the handling capacity of timber as developing countryGreatly, a large amount of dependence on import of therefore having to every year, are right angle cutter and cut at present timber cutter used,Angle is 90 °, and this right angle cutter is merely able to cut upright timber, and the volume recovery of its saw lumber mode isBe generally 56.62%, volume recovery is lower, and timber has been caused to great waste.
Therefore, how providing a kind of notch cuttype lath, to improve volume recovery, is current art technology peopleThe technical problem that member is urgently to be resolved hurrily.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of notch cuttype lath, to improve volume recovery. ThisAnother object of invention is to provide a kind of notch cuttype lath semi-finished product.
In order to achieve the above object, the invention provides following technical scheme:
A kind of notch cuttype lath, its cross section comprise the first inclined plane, the second inclined plane, the 3rd inclined plane,The 4th inclined plane, the first plane, the second plane, the 3rd plane and Siping City's face, wherein, described firstPlane, described the second plane, described the 3rd plane and described the 4th plane parallel, described Siping City face isBottom surface, in the time that described Siping City face is horizontal plane, the one end on described the first inclined plane connects described Siping CityOne end of face, and in the other end on described the first inclined plane obliquely extend and with one of described the first planeEnd connects, and the one end on described the second inclined plane connects the other end of described the first plane, and described second inclinesIn the other end on inclined-plane, extend obliquely and be connected described the 3rd inclined plane with one end of described the second planeOne end connect the other end of described the second plane, and the other end on described the 3rd inclined plane is outer oblique downwardStretch and be connected with one end of described the 3rd plane, the one end on described the 4th inclined plane connects described the 3rd planeThe other end, and the outer oblique downward-extension of the other end on described the 4th inclined plane with described the quadriplanar anotherOne end connects.
Preferably, the interior angle of above-mentioned the first inclined plane and described the first plane is 101 °.
Preferably, the interior angle of above-mentioned the second inclined plane and described the second plane is 101 °.
Preferably, the interior angle of above-mentioned the 3rd inclined plane and described the second plane is 101 °.
Preferably, the interior angle of above-mentioned the 4th inclined plane and described the 3rd plane is 101 °.
Preferably, the width of above-mentioned the second plane is 23mm.
Preferably, above-mentioned quadriplanar width is 37mm.
Preferably, the vertical plane standoff height on above-mentioned the first inclined plane is 7.3mm, described the second inclined planeVertical plane standoff height be 7.4mm.
The present invention also provides a kind of notch cuttype lath semi-finished product, comprises that two as described in above-mentioned any oneNotch cuttype lath, the 4th planar alignment of two described notch cuttype laths is fitted and is integral type structure.
Preferably, above-mentioned notch cuttype lath semi-finished product self material is core axle.
Notch cuttype lath provided by the invention, its cross section comprises the first inclined plane, the second inclined plane,Three inclined planes, the 4th inclined plane, the first plane, the second plane, the 3rd plane and Siping City's face, wherein,Described the first plane, described the second plane, described the 3rd plane and described the 4th plane parallel, describedMian Wei bottom surface, Siping City, in the time that described Siping City face is horizontal plane, the one end on described the first inclined plane connects instituteState quadriplanar one end, and in the other end on described the first inclined plane obliquely extend and with described firstOne end of plane connects, and the one end on described the second inclined plane connects the other end of described the first plane, and instituteState and in the other end on the second inclined plane, extend obliquely and be connected with one end of described the second plane, described theThe one end on three inclined planes connects the other end of described the second plane, and outside the other end on described the 3rd inclined planeOblique downward-extension is also connected with one end of described the 3rd plane, described in the one end on described the 4th inclined plane connectsThe other end of the 3rd plane, and the outer oblique downward-extension of the other end on described the 4th inclined plane with the described the 4thThe other end of plane connects.
The shape of notch cuttype lath provided by the invention is different from traditional square lath, obtains by changeThe shape of lath improve volume recovery.
Taking raw material wood mandrel radius as 19.5mm is as example, its maximum square timber that can make transversalThe length of face is 23mm, and width is 14.7mm, the size of the maximum notch cuttype lath 8 that it can makeFor, the interior angle of the first inclined plane 1 and the first plane 5 is 101 °, the second inclined plane 2 and the second plane6 interior angle is 101 °, and the interior angle of the 3rd inclined plane 3 and the second plane 6 is 101, the four inclinationsThe interior angle of face 4 and the 3rd plane 7 is 101 °, and the width of the second plane 5 is 23mm, Siping City's faceWidth be 37mm, the vertical plane standoff height on the first inclined plane 1 is 7.3mm, the second inclined plane 2Vertical plane standoff height be 7.4mm.
The volume recovery of two kinds of saw lumber modes can be calculated by following formula:
X1＝S1/S
X2＝S2/S
In formula: X1---traditional square saw lumber mode volume recovery (%)
X2---novel stairstepping saw lumber mode volume recovery (%)
S---wood spool circular cross-sectional area (mm2)
S1---traditional square saw lumber mode cross-sectional area (mm2)
S2---novel stairstepping saw lumber mode cross-sectional area (mm2)
The area of wood spool circular cross section is calculated by following formula
S＝π·r2＝3.14×19.52≈1194(mm2)
In formula: r---wood spool circular cross section radius (mm)
The area of traditional square saw lumber mode cross section is calculated by following formula
S1＝2l·w＝2×23×14.7≈676(mm2)
In formula: l---traditional square saw lumber mode cross-section lengths (mm)
W---traditional square saw lumber mode cross-sectional width (mm)
The area of novel stairstepping saw lumber mode cross section is calculated by following formula
S2＝2(T1+T2)
In formula: T1---novel stairstepping saw lumber mode cross section the first half trapezoidal area (mm2)
T2---novel stairstepping saw lumber mode cross section the latter half trapezoidal area (mm2)
Can calculate according to each several part size
T1＝7.4×tan(101°-90°)×7.4+23×7.4≈181(mm2)
T2＝37×7.3-7.3×tan(101°-90°)×7.3≈260(mm2)
By novel numerical value substitution stairstepping saw lumber mode cross-sectional area computing formula
S2＝2(T1+T2)≈2×(181+260)＝882(mm2)
Therefore the volume recovery of two kinds of saw lumber modes is as follows
X1＝S1/S≈676/1194≈56.62％
X2＝S2/S≈882/1194≈73.87％
Calculate according to the lath of producing 1 ten thousand stere, need the wood spool volume of timber consuming to be calculated by following formula
V1＝10000/X1≈10000/0.5662≈17661.6(m3)
V2＝10000/X2≈10000/0.7387≈13537.3(m3)
In formula: V1---traditional square saw lumber mode is produced the required wood spool volume of timber of 1 ten thousand stere lath (m3)
V2---novel stairstepping saw lumber mode is produced the required wood spool volume of timber of 1 ten thousand stere lath (m3)
Can find out by calculating, the volume recovery that obtains notch cuttype lath provided by the invention is 73.87%,The volume recovery of traditional square saw lumber mode is 56.62%, and volume recovery has improved 17.25%, novel stairstepping systemThe volume recovery of material mode is 1.3 times of volume recovery of traditional square saw lumber mode. According to producing 10,000 cubesThe lath of rice calculates, and traditional square saw lumber mode need consume the wood spool volume of timber approximately 1.8 ten thousand steres, novel rankTrapezoidal saw lumber mode need consume the wood spool volume of timber approximately 1.4 ten thousand steres, and novel stairstepping saw lumber mode is saved intoMaterial use quantity approximately 0.4 ten thousand stere, with 650 yuan of calculating of every cubic metre of poplar log price, saves cost 260Wan Yuan.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will be to realityThe accompanying drawing of executing required use in example or description of the Prior Art is briefly described, apparently, belowAccompanying drawing in description is some embodiments of the present invention, for those of ordinary skill in the art, notPay under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of the notch cuttype lath that Fig. 1 provides for the embodiment of the present invention;
The half-finished structural representation of notch cuttype lath that Fig. 2 provides for the embodiment of the present invention.
In upper Fig. 1 and Fig. 2:
The first inclined plane 1, the second inclined plane 2, the 3rd inclined plane 3, the 4th inclined plane 4, the first plane 5,The second plane 6, the 3rd plane 7, notch cuttype lath 8, notch cuttype lath semi-finished product 9, core axle 10.
Detailed description of the invention
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with thisAccompanying drawing in bright embodiment, is clearly and completely described the technical scheme in the embodiment of the present invention,Obviously, described embodiment is the present invention's part embodiment, instead of whole embodiment. Based onEmbodiment in the present invention, those of ordinary skill in the art obtain not making under creative work prerequisiteThe every other embodiment obtaining, belongs to the scope of protection of the invention.
Please refer to Fig. 1 and Fig. 2, the structural representation of the notch cuttype lath that Fig. 1 provides for the embodiment of the present invention;The half-finished structural representation of notch cuttype lath that Fig. 2 provides for the embodiment of the present invention.
The notch cuttype lath 8 that the embodiment of the present invention provides, its cross section comprises that the first inclined plane 1, second inclinesInclined-plane 2, the 3rd inclined plane 3, the 4th inclined plane 4, the first plane 5, the second plane 6, the 3rd plane 7With Siping City's face, wherein, the first plane 5, the second plane 6, the 3rd plane 7 and the 4th plane parallel,Mian Wei bottom surface, Siping City, in the time that Siping City's face is horizontal plane, the one end on the first inclined plane 1 connects Siping CityOne end of face, and in the other end on the first inclined plane 1, extend obliquely and connect with one end of the first plane 5Connect, the one end on the second inclined plane 2 connects the other end of the first plane 5, and another of the second inclined plane 2In end, extend obliquely and be connected with one end of the second plane 6, the one end on the 3rd inclined plane 3 connects secondThe other end of plane 6, and the outer oblique downward-extension of the other end on the 3rd inclined plane 3 with the 3rd plane 7One end connects, and the one end on the 4th inclined plane 4 connects the other end of the 3rd plane 7, and the 4th inclined plane 4The outer oblique downward-extension of the other end and be connected with the quadriplanar other end.
The shape of the notch cuttype lath 8 provided by the invention that employing stairstepping saw lumber mode obtains and traditionalSquare lath difference, the shape of the lath obtaining by change improves volume recovery.
Taking raw material core axle 10 radiuses as 19.5mm is as example, its maximum square timber that can makeThe length of cross section is 23mm, and width is 14.7mm, the maximum notch cuttype lath 8 that it can makeBe of a size of, the interior angle of the first inclined plane 1 and the first plane 5 is 101 °, the second inclined plane 2 and secondThe interior angle of plane 6 is 101 °, and the interior angle of the 3rd inclined plane 3 and the second plane 6 is 101, the fourThe interior angle of inclined plane 4 and the 3rd plane 7 is 101 °, and the width of the second plane 5 is 23mm, the 4thThe width of plane is 37mm, and the vertical plane standoff height on the first inclined plane 1 is 7.3mm, the second inclined plane2 vertical plane standoff height is 7.4mm.
The volume recovery of two kinds of saw lumber modes can be calculated by following formula:
X1＝S1/S
X2＝S2/S
In formula: X1---traditional square saw lumber mode volume recovery (%)
X2---novel stairstepping saw lumber mode volume recovery (%)
S---wood spool circular cross-sectional area (mm2)
S1---traditional square saw lumber mode cross-sectional area (mm2)
S2---novel stairstepping saw lumber mode cross-sectional area (mm2)
The area of wood spool circular cross section is calculated by following formula
S＝π·r2＝3.14×19.52≈1194(mm2)
In formula: r---wood spool circular cross section radius (mm)
The area of traditional square saw lumber mode cross section is calculated by following formula
S1＝2l·w＝2×23×14.7≈676(mm2)
In formula: l---traditional square saw lumber mode cross-section lengths (mm)
W---traditional square saw lumber mode cross-sectional width (mm)
The area of novel stairstepping saw lumber mode cross section is calculated by following formula
S2＝2(T1+T2)
In formula: T1---novel stairstepping saw lumber mode cross section the first half trapezoidal area (mm2)
T2---novel stairstepping saw lumber mode cross section the latter half trapezoidal area (mm2)
Can calculate according to each several part size
T1＝7.4×tan(101°-90°)×7.4+23×7.4≈181(mm2)
T2＝37×7.3-7.3×tan(101°-90°)×7.3≈260(mm2)
By novel numerical value substitution stairstepping saw lumber mode cross-sectional area computing formula
S2＝2(T1+T2)≈2×(181+260)＝882(mm2)
Therefore the volume recovery of two kinds of saw lumber modes is as follows
X1＝S1/S≈676/1194≈56.62％
X2＝S2/S≈882/1194≈73.87％
Calculate according to the lath of producing 1 ten thousand stere, need the wood spool volume of timber consuming to be calculated by following formula
V1＝10000/X1≈10000/0.5662≈17661.6(m3)
V2＝10000/X2≈10000/0.7387≈13537.3(m3)
In formula: V1---traditional square saw lumber mode is produced the required wood spool volume of timber of 1 ten thousand stere lath (m3)
V2---novel stairstepping saw lumber mode is produced the required wood spool volume of timber of 1 ten thousand stere lath (m3)
Can find out by calculating, the volume recovery that obtains notch cuttype lath 8 provided by the invention is 73.87%,The volume recovery of traditional square saw lumber mode is 56.62%, and volume recovery has improved 17.25%, novel stairstepping systemThe volume recovery of material mode is 1.3 times of volume recovery of traditional square saw lumber mode. According to producing 10,000 cubesThe lath of rice calculates, and traditional square saw lumber mode need consume the wood spool volume of timber approximately 1.8 ten thousand steres, novel rankTrapezoidal saw lumber mode need consume the wood spool volume of timber approximately 1.4 ten thousand steres, and novel stairstepping saw lumber mode is saved intoMaterial use quantity approximately 0.4 ten thousand stere, with 650 yuan of calculating of every cubic metre of poplar log price, saves cost 260Wan Yuan.
The embodiment of the present invention also provides a kind of notch cuttype lath semi-finished product 9, comprises two as above-mentioned any oneThe 4th planar alignment of 8, two the notch cuttype laths 8 of notch cuttype lath described in embodiment is fitted and is integratedFormula structure. Notch cuttype lath semi-finished product 9 self material can be core axle 10, notch cuttype lath semi-finished productHalf one-tenth that the 9 cylindrical raw material that are actually core axle 10 1 classes obtain after specific Tool in CuttingProduct, structure now as shown in Figure 2, can obtain ladder after so now only need to cutting core axle 10Template bar semi-finished product 9, then cut open from center line symmetry, as shown in Figure 1, can obtain two stepped platesBar 8.
When making, be to be 40mm by diameter core axle 10 is dried, after drying, diameter is about 39mm,Then wood spool is sawed to solution and become the stairstepping lath 8 that 14.7mm is thick, carry out afterwards gluing splicing, side pressure moulding,Then through central layer gluing, central layer jigsaw side pressure moulding, central layer greasyly repair, after central layer heating, central layer sanding,With middle plate assembly, hot pressing, repair, veneer, finished product saw limit last sorting finished product inspection and packaging in then.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field can be realized or useThe present invention. To be aobvious and easy for those skilled in the art to the multiple amendment of these embodimentSee, General Principle as defined herein can be in the situation that not departing from the spirit or scope of the present invention,Realize in other embodiments. Therefore, the present invention will can not be restricted to these embodiment shown in this article,But to meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a notch cuttype lath, is characterized in that, its cross section comprises that the first inclined plane, second tiltsFace, the 3rd inclined plane, the 4th inclined plane, the first plane, the second plane, the 3rd plane and Siping City's face,Wherein,
Described the first plane, described the second plane, described the 3rd plane and described the 4th plane parallel,
Mian Wei bottom surface, described Siping City, in the time that described Siping City face is horizontal plane,
The one end on described the first inclined plane connects described quadriplanar one end, and described the first inclined planeIn the other end, extend obliquely and be connected with one end of described the first plane,
The one end on described the second inclined plane connects the other end of described the first plane, and described the second inclined planeThe other end in obliquely extend and be connected with one end of described the second plane,
The one end on described the 3rd inclined plane connects the other end of described the second plane, and described the 3rd inclined planeThe outer oblique downward-extension of the other end and be connected with one end of described the 3rd plane,
The one end on described the 4th inclined plane connects the other end of described the 3rd plane, and described the 4th inclined planeThe outer oblique downward-extension of the other end and be connected with the described quadriplanar other end.
2. notch cuttype lath according to claim 1, is characterized in that, described the first inclined plane withThe interior angle of described the first plane is 101 °.
3. notch cuttype lath according to claim 1, is characterized in that, described the second inclined plane withThe interior angle of described the second plane is 101 °.
4. notch cuttype lath according to claim 1, is characterized in that, described the 3rd inclined plane withThe interior angle of described the second plane is 101 °.
5. notch cuttype lath according to claim 1, is characterized in that, described the 4th inclined plane withThe interior angle of described the 3rd plane is 101 °.
6. notch cuttype lath according to claim 1, is characterized in that, described the second plane wideDegree is 23mm.
7. notch cuttype lath according to claim 1, is characterized in that, described quadriplanar wideDegree is 37mm.
8. notch cuttype lath according to claim 1, is characterized in that, described the first inclined planeVertical plane standoff height is 7.3mm, and the vertical plane standoff height on described the second inclined plane is 7.4mm.
9. notch cuttype lath semi-finished product, is characterized in that, comprise that two as the claims 1-8Notch cuttype lath described in any one, the 4th planar alignment of two described notch cuttype laths is fitted and isIntegral structure.
10. notch cuttype lath semi-finished product according to claim 9, is characterized in that, self materialFor core axle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610156841.0A CN105605409A (en) | 2016-03-18 | 2016-03-18 | Step type batten semi-finished product and step type batten thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610156841.0A CN105605409A (en) | 2016-03-18 | 2016-03-18 | Step type batten semi-finished product and step type batten thereof |
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| CN105605409A true CN105605409A (en) | 2016-05-25 |
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|---|---|---|---|
| CN201610156841.0A Pending CN105605409A (en) | 2016-03-18 | 2016-03-18 | Step type batten semi-finished product and step type batten thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3420644A1 (en) * | 1984-06-02 | 1985-12-05 | Gerhard Kosche GmbH, 5203 Much | Rustic round bar |
| FR2667677B1 (en) * | 1990-10-05 | 1993-04-09 | Lacaze Patrick | PROFILES FOR WOOD FRAMES. |
| EP0606633A2 (en) * | 1993-04-23 | 1994-07-20 | Waldenburger Holzkabinett | A set of wooden building blocks |
| CN101055059A (en) * | 2006-04-13 | 2007-10-17 | 陈毅 | Small diameter timber utilization structure and its utilization method |
| CN205504446U (en) * | 2016-03-18 | 2016-08-24 | 吉林省云山木业有限公司 | Notch cuttype lath semi -manufactured goods and notch cuttype lath thereof |
-
2016
- 2016-03-18 CN CN201610156841.0A patent/CN105605409A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3420644A1 (en) * | 1984-06-02 | 1985-12-05 | Gerhard Kosche GmbH, 5203 Much | Rustic round bar |
| FR2667677B1 (en) * | 1990-10-05 | 1993-04-09 | Lacaze Patrick | PROFILES FOR WOOD FRAMES. |
| EP0606633A2 (en) * | 1993-04-23 | 1994-07-20 | Waldenburger Holzkabinett | A set of wooden building blocks |
| CN101055059A (en) * | 2006-04-13 | 2007-10-17 | 陈毅 | Small diameter timber utilization structure and its utilization method |
| CN205504446U (en) * | 2016-03-18 | 2016-08-24 | 吉林省云山木业有限公司 | Notch cuttype lath semi -manufactured goods and notch cuttype lath thereof |
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Application publication date: 20160525 |