CN116078647A - Rubber bubble repairing method for 3C1B process - Google Patents
Rubber bubble repairing method for 3C1B process Download PDFInfo
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- CN116078647A CN116078647A CN202310064047.3A CN202310064047A CN116078647A CN 116078647 A CN116078647 A CN 116078647A CN 202310064047 A CN202310064047 A CN 202310064047A CN 116078647 A CN116078647 A CN 116078647A
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- repairing
- vehicle body
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- treatment
- foam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a rubber foam repairing method of a 3C1B process, which comprises the following steps: s10, performing finish paint spraying treatment on the vehicle body to form a vehicle body subjected to finish paint treatment; s20, checking the vehicle body subjected to the surface painting treatment, and if obvious rubber bubbles exist, cutting the rubber bubbles to form the vehicle body subjected to the rubber bubble cutting treatment; s30, performing rubber foam repair treatment on the vehicle body subjected to rubber foam cutting treatment by adopting normal-temperature curing rubber to form a vehicle body subjected to rubber foam repair treatment; s40, performing finishing coat repair treatment on the vehicle body subjected to the rubber foam repair treatment to form a vehicle body subjected to the finishing coat repair treatment; s50, naturally curing the vehicle body subjected to the finish repair treatment. The invention has the advantages of simple repairing process of the rubber foam by natural solidification and quick repairing, can realize on-line repairing, avoid the problem of vehicle body out-of-order caused by off-line repairing of the vehicle body, and improve the production efficiency.
Description
Technical Field
The invention relates to the technical field of automobile manufacturing, in particular to a rubber bubble repairing method of a 3C1B process.
Background
The sealant foam is a quality defect generated on sealant in four-door two-cover flanging areas of an automobile body, and is a problem which affects the corrosion resistance of the automobile body and the aesthetic experience of a user on the automobile body because the areas are usually exposed in the visible areas of the automobile body, at present, each automobile factory usually controls and repairs the sealant foam in a coating workshop, but the flanging sealant foam is generated for a plurality of reasons, and spans two procedures of welding and coating, the adjustment and improvement difficulty is large and the time is long, the repair flow of the PVC sealant foam is complex, the time is long, the production efficiency is affected, and how to realize the quick repair of the sealant foam is a problem which needs to be solved urgently,
the repair flow of the rubber foam changes along with the change of the spraying process. Along with the increasing competition of the automobile industry, energy conservation, consumption reduction and environmental protection are main means of synergy and revenue generation of each host factory, so that each large host factory is transformed from a 3C2B solvent-based paint process to a 3C1B water-based paint process in a dispute. The 3C1B eliminates a middle coating polishing station and a middle coating drying furnace, so that the glue foam repairing treatment cannot be carried out before paint spraying, and the glue foam repairing treatment can only be carried out on a finishing line. The repair of the sealant foam is carried out on the finishing line, the treatment time is long, and because the sealant foam is mostly caused by the gas existing in the metal plate flanging, the sealant foam is baked after repair, the flanging gas is not exhausted, the repair part is foamed again, the replacement processing is needed, the production efficiency is greatly influenced, the replacement incidence is high, and the production cost rises.
Disclosure of Invention
The invention mainly aims to provide a rubber bubble repairing method of a 3C1B process, and aims to solve the problems that in the prior art, the repairing time of rubber bubbles is long, online repairing cannot be carried out, and the repairing efficiency is low.
The invention provides a rubber foam repairing method of a 3C1B process, which comprises the following steps:
s10, performing finish paint spraying treatment on the vehicle body to form a vehicle body subjected to finish paint treatment;
s20, checking the vehicle body subjected to the surface painting treatment, and if obvious rubber bubbles exist, cutting the rubber bubbles to form the vehicle body subjected to the rubber bubble cutting treatment;
s30, performing rubber foam repair treatment on the vehicle body subjected to rubber foam cutting treatment by adopting normal-temperature curing rubber to form a vehicle body subjected to rubber foam repair treatment;
s40, performing finishing coat repair treatment on the vehicle body subjected to the rubber foam repair treatment to form a vehicle body subjected to the finishing coat repair treatment;
s50, naturally curing the vehicle body subjected to the finish repair treatment.
Optionally, in step S20, the apparent bubble is a bubble having a diameter > 10mm, and/or;
the height of the rubber foam is more than 3mm.
Optionally, in step S20, the number of obvious bubbles is greater than 3 in the same area, and/or;
the distance between adjacent rubber bubbles is less than 20cm.
Optionally, in step S30, the repairing treatment of the vehicle body after the dicing of the rubber foam includes repairing treatment with a normal-temperature curing rubber.
Optionally, the ambient cure gel comprises a silane-modified polyether.
Optionally, in step S30, performing the repairing treatment on the vehicle body after the cutting treatment on the rubber foam includes scraping the repairing portion of the rubber foam with a scraping plate.
Optionally, in step S40, the repairing of the finishing paint on the vehicle body after the repairing of the rubber foam includes repairing the finishing paint on the vehicle body after the repairing of the rubber foam after the preparation of the repairing colored paint, the repairing varnish and the resin.
Optionally, the repair paint comprises a paint, a diluent, and a curing agent.
Optionally, the mass ratio of the color paint to the diluent to the curing agent is 1: (0.9-1.2): (0.25-0.33).
Optionally, the repair varnish includes a varnish, a diluent, and a curing agent.
Optionally, the mass ratio of the varnish to the diluent to the curing agent is 1: (0.4-0.8): (0.32-0.34).
The repairing method of the rubber foam in the 3C1B process has the advantages of simple repairing process of the rubber foam and quick repairing, and can realize on-line repairing, avoid the problem of vehicle body out-of-order caused by off-line repairing of the vehicle body, and improve the production efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a prior art method of repairing a bubble in a 3C1B process;
fig. 2 is a flowchart of an embodiment of a method for repairing a bubble in a 3C1B process according to the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The sealant foam is a quality defect generated on sealant in four-door two-cover flanging areas of an automobile body, and is a problem which affects the corrosion resistance of the automobile body and the aesthetic experience of a user on the automobile body because the areas are usually exposed in the visible areas of the automobile body, at present, each automobile factory usually controls and repairs the sealant foam in a coating workshop, but the flanging sealant foam is generated for a plurality of reasons, and spans two procedures of welding and coating, the adjustment and improvement difficulty is large and the time is long, the repair flow of the PVC sealant foam is complex, the time is long, the production efficiency is affected, and how to realize the quick repair of the sealant foam is a problem which needs to be solved urgently,
the repair flow of the rubber foam changes along with the change of the spraying process. Along with the increasing competition of the automobile industry, energy conservation, consumption reduction and environmental protection are main means of synergy and revenue generation of each host factory, so that each large host factory is transformed from a 3C2B solvent-based paint process to a 3C1B water-based paint process in a dispute. The 3C1B eliminates a middle coating polishing station and a middle coating drying furnace, so that the glue foam repairing treatment cannot be carried out before paint spraying, and the glue foam repairing treatment can only be carried out on a finishing line. The repair of the sealant foam is carried out on the finishing line, the treatment time is long, and because the sealant foam is mostly caused by the gas existing in the metal plate flanging, the sealant foam is baked after repair, the flanging gas is not exhausted, the repair part is foamed again, the replacement processing is needed, the production efficiency is greatly influenced, the replacement incidence is high, and the production cost rises. In view of the above, the invention provides a repairing method for a rubber foam of a 3C1B process, which aims to solve the problems that the repairing time of the rubber foam is long, the repairing cannot be carried out on line and the repairing efficiency is low in the prior art. FIG. 1 is a flow chart of a method for repairing a rubber bubble in a 3C1B process in the prior art; fig. 2 is a flowchart of an embodiment of a method for repairing a bubble in a 3C1B process according to the present invention.
The invention provides a rubber bubble repairing method of a 3C1B process, which comprises the following steps:
s10, performing finish paint spraying treatment on the vehicle body to form a vehicle body subjected to finish paint treatment;
s20, checking the vehicle body subjected to the surface painting treatment, and if obvious rubber bubbles exist, cutting the rubber bubbles to form the vehicle body subjected to the rubber bubble cutting treatment;
when finishing paint inspection, visual hand touch can be adopted to inspect the inspection position, the bubble is found to exceed the release standard, 3M adhesive tape paper is used for pasting the mark on the defect position, a processor performs defect treatment according to the mark, a craft knife is adopted to cut the bubble flat along the edge of the bubble, the knife face of the craft knife is required to be clung to the adhesive tape of the non-bubbling part in parallel, the knife edge is perpendicular to the edge of the PVC bubble for cutting, the cutting face is required to be flat, the hole range of the cutting face is slightly larger than the size of the bubble, and the cut is not higher than the surface of the adhesive tape.
S30, performing rubber foam repair treatment on the vehicle body subjected to rubber foam cutting treatment by adopting normal-temperature curing rubber to form a vehicle body subjected to rubber foam repair treatment;
the repairing treatment of the car body after the cutting treatment of the rubber foam comprises the repairing treatment by adopting normal-temperature curing rubber, specifically, the normal-temperature curing rubber can be extruded by a manual rubber gun and is extruded and filled into the holes of the rubber foam which are cut flat, the repairing surface is required to be slightly higher than the surface of the rubber strip, the filling and sealing are ensured, the normal-temperature curing rubber performance is superior to that of other materials such as putty, putty powder and the like, and the normal-temperature curing can be realized without baking.
S40, performing finishing coat repair treatment on the vehicle body subjected to the rubber foam repair treatment to form a vehicle body subjected to the finishing coat repair treatment;
s50, naturally curing the vehicle body subjected to the finish repair treatment.
According to the technical scheme, through natural solidification, the repairing process of the rubber foam is simple, the repairing is rapid, on-line repairing can be realized, the problem of vehicle body out-of-order caused by off-line repairing of the vehicle body is avoided, and the production efficiency is improved.
Further, in step S20, the apparent bubble is a bubble having a diameter of > 10mm, i.e. a single bubble having a diameter of greater than 10mm is considered to be repaired. More than 10mm, the rubber foam is obvious in appearance, and the appearance is not good.
Further, in step S20, the obvious bubble is a bubble with a height > 3mm, i.e. the single bubble has a height greater than 3mm, which is considered to be repaired. The height of the rubber foam is larger than that of the rubber foam, which means that the bulge height of the rubber foam is larger, the appearance is affected, and the repair is needed.
Further, in step S20, the number of obvious bubbles is greater than 3 in the same area, that is, the number of bubbles on the same side or the same part is greater than 3, which is considered as the need of repairing the bubbles. The number of the gelatin bubbles in the same area is more than 3, so that the number of the gelatin bubbles is too large, the visual attractiveness is impaired, and the repair is needed.
Further, in step S20, the apparent bubble is the distance between adjacent bubbles is less than 20cm, that is, the distance between adjacent bubbles is less than 20cm, which is regarded as the repairing of the bubble. When the height of the gelatin bubbles is less than 20cm, the adjacent distance between the gelatin bubbles is too short, which hinders visual beauty and needs to be repaired.
It should be noted that the above-mentioned obvious bubble conditions may occur simultaneously or may occur separately, and the defect of the bubble is more serious.
Further, the normal temperature curing glue comprises silane modified polyether. The normal temperature solidified weld seam sealing glue is gun type monocomponent sealing glue with MS polymer as base material, the MS polymer is one kind of cross-linked polymer based on silane end capped polyether, and is prepared with MS prepolymer, i.e. end alkyl polyether, and the MS prepolymer has low strength. Naturally curable in natural environments, surface formation and cure time depend on the relative humidity and temperature of the environment, and cure time also depends on the depth of the joint. The surface forming time and curing time can be shortened by increasing the temperature and humidity. And the adhesive has good adhesion and ultraviolet aging resistance, can be matched with paint spraying, and can be used for achieving surface drying for 2 hours and complete curing for 24 hours. The viscosity of the sealant is increased at a low temperature, extrusion becomes difficult, and the problem can be avoided by raising the temperature of the sealant to room temperature before use, for example, a normal-temperature curing glue tank to be used can be placed in an laboratory 1h in advance in winter, and the temperature of the glue tank is raised to room temperature, and the glue tank is generally kept at a constant temperature of 25 ℃. In winter, the air temperature is low, and when the wire is opened, first-batch vehicles are stored on the wire at night, so that the temperature is low, water vapor is condensed on the surface, glue is solidified quickly when glue is smeared, construction is difficult, and the wiping cloth is required to wipe the glue supplementing part. The viscosity of the normal-temperature curing adhesive is higher than that of the conventional welding seam sealing adhesive, the speed of extruding the adhesive by using an adhesive gun is relatively low, and the adhesive is smoothed at one time as much as possible during repairing, so that reworking is avoided.
Further, in step S30, the repairing treatment of the vehicle body after the cutting treatment of the rubber foam includes scraping the repairing portion of the rubber foam with a scraping plate. The scraping plate is characterized in that the scraping plate is slightly forced and scraped as much as possible, so that the glue surface is difficult to scrape after the mobility of the glue is reduced, and reworking is required, specifically, the scraping plate is pressed on a perfect glue strip near a repaired glue hole vertically or slightly inclined, the scraping surface of the scraping plate is downwards or upwards along the glue strip profile, the scraping plate is also downwards or upwards, the direction convenient to operate is selected according to the position of the glue supplementing part, the glue is scraped in a scraping direction which is higher than the glue surface, until the edge of the glue supplementing hole is in smooth transition with the whole glue strip, the scraping plate can enable the glue surface to be smooth and even, the scraping plate is generally made of a material with moderate hardness, the shape is generally like a wedge body, the grabbing operation is facilitated, the plane of the scraping plate for scraping is required to be smooth and even, the scraping plate can generate abrasion in the use process, the plane of the scraping plate generates gaps when the broken scraping plate is used for scraping the glue, the glue surface is uneven, the appearance is bad, the new scraping plate is required to be replaced when the scraping plate is damaged, the scraping surface of the glue surface is damaged, and the scraping plate is smooth after the gap appears, and the plane of the scraping plate is used. After the glue scraping is finished, the appearance of glue repairing is confirmed, the excessive residual glue is wiped by wiping cloth, the glue repairing is qualified through smooth transition between the glue repairing position and the glue strip which normally does not need glue repairing, the problems of protrusion, recess and leakage hole are avoided, after the appearance is qualified, the next step is carried out, and after the appearance is qualified, the glue repairing is carried out again after the glue scraping is not qualified.
Further, in step S40, the repair treatment of the finishing paint on the vehicle body after the repair treatment of the rubber foam includes the repair of the finishing paint on the vehicle body after the repair treatment of the rubber foam after the repair of the vehicle body with the repair color paint, the repair varnish and the resin. The repairing colored paint, repairing varnish and port resin are subjected to repairing after being modulated according to the paint mixing proportion, the slow tackifying phenomenon of the paint can be shown after the paint mixing is finished, and the paint is required to be used within 4 hours after the paint mixing is finished, so that the paint is required to be modulated according to the field use amount and can not be modulated too much at one time to avoid waste, the repairing paint is added into a pneumatic paint spray gun, the pneumatic paint spray gun is connected with a high-pressure air pipe, the caliber of the pneumatic paint spray gun is preferably 0.8mm or 1.0mm, a W-101 kettle gun is adopted, and the high-pressure air pressure value is set between 0.24 MPa and 0.29 MPa.
Further, the repair paint comprises a paint, a diluent and a curing agent. The aim of low-temperature curing can be achieved by adding a reasonable proportion of curing agent, the surface of the repair color paint and the repair varnish can be dried within 4 hours, basic curing is achieved after 48 hours, and complete curing is achieved after 144 hours.
Further, the mass ratio of the color paint to the thinner to the curing agent is 1: (0.9-1.2): (0.25-0.33). At this ratio, the repair appearance color of the paint is consistent with that of the primary paint, the viscosity is in a proper range, the paint is convenient to apply, and the curing time is controlled in a proper range.
Further, the repair varnish comprises a varnish, a diluent and a curing agent. The aim of low-temperature curing can be achieved by adding a reasonable proportion of curing agent, the surface of the repair color paint and the repair varnish can be dried within 4 hours, basic curing is achieved after 48 hours, and complete curing is achieved after 144 hours.
Further, the mass ratio of the varnish to the diluent to the curing agent is 1: (0.4-0.8): (0.32-0.34). Under the proportion, the self-curing effect can be achieved after the varnish is repaired, the visual sense of the varnish coating is consistent with that of the original vehicle body varnish coating, and the curing time is controlled within a proper range.
Wherein the main components of the repairing color paint are toluene, dimethylbenzene, methanol, n-butanol, isobutanol, diethylene glycol butyl ether, propylene glycol methyl ether propionate, dibasic acid ester, color paste, propionate, dimethyl ester acid, butanone and formaldehyde; the main components of the diluent are ethyl acetate, butyl acetate, propylene glycol methyl ether acetate and aromatic hydrocarbon solvents; the main components of the curing agent are ethyl acetate, butyl acetate, trimethyl acetate and aromatic hydrocarbon solvents; the main components of the repair varnish are dimethyl ester, butyl acetate, alcohol ether solvent and aromatic hydrocarbon solvent.
After the repair of the colored paint and the varnish is finished, the cleaning cloth is picked up, and the pre-painted part is wiped by overlapping 1/2; controlling a pneumatic paint spray gun by wrist force, moving at a speed of 30-50cm/s, overlapping 1/2 of the positions to be paint-repaired to spray the paint with the same color as the automobile body to the positions which are not paint-repaired, looking at the positions from multiple angles to ensure the consistency with the primary colors of the automobile body, spraying the prepared repair varnish to repair the positions of the paint-repaired and expanding the positions by 2-5cm; and (3) spraying the resin at the port of the port to repair the joint of the varnish by using a pneumatic paint spray gun, wherein the joint is required to be smooth visually after spraying. And (5) confirming the appearance quality, and if the appearance is unqualified, reworking until the appearance is qualified after reworking.
According to the rubber foam repairing method of the 3C1B process, through natural curing, the rubber foam repairing flow is simple, repairing is rapid, on-line repairing can be realized, the problem of vehicle body out-of-order caused by off-line repairing of a vehicle body is avoided, and the production efficiency is improved.
The foregoing is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention, but various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The repairing method of the rubber foam of the 3C1B process is characterized by comprising the following steps of:
s10, performing finish paint spraying treatment on the vehicle body to form a vehicle body subjected to finish paint treatment;
s20, checking the vehicle body subjected to the surface painting treatment, and if obvious rubber bubbles exist, cutting the rubber bubbles to form the vehicle body subjected to the rubber bubble cutting treatment;
s30, performing rubber foam repair treatment on the vehicle body subjected to rubber foam cutting treatment by adopting normal-temperature curing rubber to form a vehicle body subjected to rubber foam repair treatment;
s40, performing finishing coat repair treatment on the vehicle body subjected to the rubber foam repair treatment to form a vehicle body subjected to the finishing coat repair treatment;
s50, naturally curing the vehicle body subjected to the finish repair treatment.
2. The method for repairing a plastic foam of a 3C1B process of claim 1, wherein in step S20, the distinct plastic foam is:
the diameter of the rubber bubble is more than 10mm, and/or;
the height of the rubber foam is more than 3mm.
3. The method for repairing a plastic foam of a 3C1B process of claim 1, wherein in step S20, the distinct plastic foam is:
the number of the rubber bubbles in the same area is more than 3, and/or;
the distance between adjacent rubber bubbles is less than 20cm.
4. The method of repairing a bubble of a 3C1B process of claim 1, wherein the ambient cure gel comprises a silane-modified polyether.
5. The method for repairing a plastic foam of the 3C1B process according to claim 1, wherein in step S30, the step of performing the plastic foam repairing process on the vehicle body after the plastic foam cutting process includes using a scraping plate to scrape the plastic foam repairing portion.
6. The method for repairing a vehicle body by using a plastic foam according to claim 1, wherein in step S40, the repairing of the plastic foam by using a finishing paint comprises the steps of repairing the plastic foam by using a repairing colored paint, a repairing varnish and a resin, and the finishing paint is performed on the plastic foam by using the repairing varnish.
7. The method of repairing a bubble of a 3C1B process of claim 6, wherein the repair paint comprises a paint, a diluent, and a curing agent.
8. The method for repairing a plastic foam of a 3C1B process according to claim 7, wherein the mass ratio of the color paint to the diluent to the curing agent is 1: (0.9-1.2): (0.25-0.33).
9. The method of repairing a bubble of a 3C1B process of claim 6, wherein the repair varnish comprises a varnish, a diluent, and a curing agent.
10. The method for repairing a plastic foam of a 3C1B process of claim 9, wherein the mass ratio of the varnish, the diluent and the curing agent is 1: (0.4-0.8): (0.32-0.34).
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| CN202310064047.3A CN116078647B (en) | 2023-01-12 | 2023-01-12 | Rubber bubble repairing method for 3C1B process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310064047.3A CN116078647B (en) | 2023-01-12 | 2023-01-12 | Rubber bubble repairing method for 3C1B process |
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| CN110293041A (en) * | 2019-07-11 | 2019-10-01 | 张锡泰 | In a kind of automobile, severe scratch exempt from the renovation technique that paints |
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2023
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| US20030183320A1 (en) * | 2002-03-27 | 2003-10-02 | Nienberg Wilford D. | Vehicle repair method and kit |
| US20060257571A1 (en) * | 2005-05-16 | 2006-11-16 | Yong-Jun Tan | Method and apparatus for surface coating repair and rust prevention |
| CN101003044A (en) * | 2007-01-09 | 2007-07-25 | 孔凡星 | Method for burling shallow scratch car enamel layer |
| CN107744929A (en) * | 2017-10-31 | 2018-03-02 | 东风小康汽车有限公司重庆分公司 | A kind of 3C1B coating process |
| CN110293041A (en) * | 2019-07-11 | 2019-10-01 | 张锡泰 | In a kind of automobile, severe scratch exempt from the renovation technique that paints |
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