HB 4225-1989 MJ内螺纹小径用圆锥尾量头双头光滑塞规 MJ3.5~MJ3.9... 上一篇:HB 4233-1989 MJ螺纹校对塞规 校通-通TT MJ1.6×0.35~MJ5×0.8下一篇:HB 4224-1989 MJ内螺纹小径用针式量头双头光滑塞规 MJ1.6~MJ3