杆环 meaning in English

collar

Standard test method for shear strength of adhesives using pin - and - collar specimen
用杆和杆环试样测试胶粘剂剪切强度的标准试验方法
Numerical simulation of annulus flow of non - newtonian fluid in injection allocation regulator corrugated pole
非牛顿流体在配注器波纹杆环空中流动的数值模拟
Disc stem nut : disc stem ring connects the disc to the stem , permitting the disc to swivel and aid in securing tight seating for trouble - free service
阀瓣阀杆螺母：阀瓣阀杆环将阀瓣连接到阀杆上，使得阀瓣能够旋转，并有助于保证阀座地紧密密封和无故障运行。