钻头给进机构 bit feeding mechanism

进给机构 feeding device ; feed gear ; Polishing Machine

垂直进给机构 grinding head

液压进给机构 hydraulic feed unit

管子进给机构 tube feeding crosshead

齿条进给机构 rack feed gear

横向进给机构 transverse feed gear ; [机] transverse feed mechanism

逆进给机构 feed reversing gear

微进给机构 micro feed mechanism