reaming with step reamer

阶梯孔环件... ... ) Inverse Stepped Hole 反阶梯孔 ) reaming with step reamer 阶梯绞孔 ) reaming with step reamer 阶梯铰孔 ...

... ) reaming with step reamer 阶梯绞孔 ) reaming with step reamer 阶梯铰孔 ) drilling with step core drill 阶梯扩孔 ...