转向离合器定位器螺母
directional clutch retainer nut
喷射眼距井底最优距离定位器
positive contact off-bottom spacer
DHS定位器
dynamic hip screw positioner
Fisher智能阀门定位器
fisher intelligent valve positioner
TZIDC-200智能定位器
TZIDC-200 intelligent positioner
X线头颅侧位定位片
Cephalometric radiographs