不对称双V形坡口 asymmetric double V groove

绝代双V Vlidge

双V形对接焊 double V butt weld

双V试验 Verification&validation testing

双V型天线 double-V antenna

双V形对接接头 double V butt joint

双V型空压机 double V-type air compressor

双V形槽熔接 double V groove weld

双V形坡口 double-V groove