... double groove weld双面坡口焊缝 double-bevel groove weld双斜边坡口焊缝; 双斜坡口焊 double-flanged butt weld双弯边对接焊缝 ...
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... double-bevel groove weld双斜边坡口焊缝; 双斜坡口焊 double-flanged butt weld双弯边对接焊缝 double-V groove weld双斜边坡口焊缝; 双斜坡口焊 downhand weld平焊缝 ...
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双斜边坡口焊缝 double-bevel groove weld ; double-V groove weld ; V groove weld ; bevel groove weld
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