Fracture Analysis of 20CrMoA Sucker Rod Head’s Square Spanner in Straightening Process
20CrMoA抽油杆杆头板手方部校直断裂原因分析
A beam that connects the piston rod to the connecting rod of a reciprocating engine.
十字头连接活塞杆和往复式发动机连杆的横杆
Hexagon bolts with split pin hole on shank--Reduced shank--Product grade B
GB/T31.2-1988六角头螺杆带孔螺栓细杆B级
He knocked his head against a wire post.
他的头碰在电线杆上。
single-enveloping worm gear
圆柱[单头]蜗杆传动
hard banding of tool joint
钻杆接头表面加硬圈
A five iron used in golf.
高尔夫球5号铁头球杆
hard facing of tool joint
钻杆接头表面加硬层
steering knuckle tie rod end pressure lubricator
转向节横拉杆接头油嘴
mule-head hanger
驴头上挂抽油杆的装置
driving lever for crosshead lubricating pump
十字头润滑油泵传动杆
shoulder dressing tool
钻杆接头端面整形工具
double-purpose interchangeable tip square blade screwdriver
可换头方杆两用螺丝刀
Botox: Taking Pains to Relieve Headaches
肉毒杆菌??偏头痛克星
double pin sucker rod
两头阳螺纹的抽油杆
a long staff with one end being hook shaped.
一头被做成钩形的长杆。
sharp spikes on top of the railings in the park
公园栏杆上的尖头.
Defects Analysis on 37CrMnMo4 Drill Pipe Joints
37CrMnMo4钻杆接头缺陷分析