1.打孔装埋(螺钉头),打埋头孔
1.埋头钻;埋头孔,暗钉眼
1.to widen the top of the hole for a screw or bolt so that the head will fit into the hole and be level with or below the surface
2.to place screws, bolts, or nails in wood or another material so that their heads are level with or below the surface of the material
1.a hole for a screw or bolt that is wider at the top so that the head will fit into the hole and be level with or below the surface
2.a special drill bit or other tool for countersinking holes for screws or bolts
1.the lower part of the socket cavity is clamped between the outer and inner connecting plates, and is fixed by the countersunk bolt.
所述的外连接盘与内连接盘将接受腔下部夹持在中间，并通过沉头螺栓螺合。
2.The metal countersunk nuts that will not protrude out of aperture when it is screwing up.
为拧紧时螺钉不凸出于孔外的金属沉头螺钉。
3.Manufacture of tyre moulds in countersunk steel. Tyre manufacturing machinery construction and. . .
轮胎—生产和翻新机械|塑制品和胶制品模具…
4.railway rolling stock . grade a . countersunk and raised countersunk notched head machine screws . symbols f and fb.
铁路车辆。开口的沉头和半沉头机器螺钉。级。符号和。
5.automatically generated holes, tapped holes, countersunk holes and.
自动产生钻孔、螺纹孔、埋头孔和沉孔。
6.FASTENERS. EQUIPMENT FOR WORKING THE SOIL. COUNTERSUNK HEAD NIB BOLTS FOR FASTENING THIN WEAR PARTS.
紧固件.底板受力器材.轻微磨损零件固定用的双耳埋头螺栓
7.Carriage bolt (coach bolt): Has a domed or countersunk head, and the shank is topped by a short square section under the head.
马车螺栓（螺栓教练）：有一个圆顶或沉头，而小腿是由简短根据头方节突破。
8.Railway rolling stock. Grade A. Slotted or notched raised countersunk head screws nuts. Symbol FBP.
铁路车辆.开槽懦半沉头螺钉一螺母.A级.符号FBP
9.Aerospace; rivet design values static load, for countersunk rivet joints, single shear, dimpled; rivet material 2.
航空和航天.用于静态负荷的沉头铆钉连接的铆钉计算值.单边剪切.压花.铆钉材料2。
10.Railway rolling stock. Grade A. Slotted countersunk head screws nuts. Symbol FP.
铁路车辆.开槽沉头螺钉，螺母.A级。