GD40A-前接头-热后半成品,GD40A-后接头-热后半成品,GD40A-保持环,GD40A-外套管(含导向套),GD40A-气缸,GK40-气缸,GK40-配气座,GK40-导向套,GK40-后接头-热后半成品,GD50A-前接头-热后半成品,GD50A-后接头-热后半成品,GD50A-保持环,GD50A-活塞,GD50A-外套管(含导向套),GD50A-气缸,GD50A-配气座,GK50-Y-前接头(配GY50钻头),GK50-Y-保持环,GK50-Y-导向套,GK50S-外套管(前接头双头螺纹),
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