Drill Collar Slip 钻铤卡瓦
core gripper with slip-collar 卡箍式岩心爪 ; 箍式岩心爪
slip-stitching collar to garments 纟乔领下口
Slip Collar 上幼犬要挣脱这种项圈
collar rotary slip 环形钻铤转盘卡瓦
core catcher with slip-collar 卡箍岩心爪
slip-stitching collar to gupper extremityents 纟乔领下口
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