 |
| Chinese | English |
| 电标准绕距 | standard pitch |
| 标准螺距 | standard pitch |
| 气泡平放水准器 | block level |
| 美国标准直管内螺纹 | American Standard internal straight pipe threads |
| 美国标准美制直管螺纹 | American Standard straight pipe thread (national pipe straight thread) |
| 美国标准粗螺纹 | national coarse thread |
| 美国标准细螺纹 | national fine thread |
| 美国标准美制锥形管螺纹 | national standard pipe taper thread |