您要查找的是不是：
- 带球套的管螺纹连接。环形套管的空心螺栓接管Compression couplings with spherical liner; male studed banjo bolts for ring type nipples
- 属于、关于或形状象环形、园环形。of or relating to or shaped like a toroid; doughnut shaped.
- 套管叉bushing fork
- 有环形金属喷头管的。a circular metal pipe with several small holes through which gas can escape to be burned.
- 套管气casing gas
- 环形封隔annular packoff
- 套管台casing set-back
- ERW套管ERW casing
- 环形堰annular weir
- 环形楼梯的中心支柱。the central pillar of a circular staircase.
- 三套管three-pipe
- 环形齿ring teeth
- 上下活动套管reciprocate casing
- 环形栅round gate structure
- 套管结构canular structure
- 最后,用户通过两点指定环形阵列的旋转轴来完成创建操作Specify center point of array: Specify second point on axis of rotation
- 套管直径casing diameter
- 套管偏心casing eccentricity
- 三环形腔Three-ring resonators
- 环形火焰Toroidal flame
