摘要
介绍了新型抽油杆防脱安全吊钩的结构和工作原理。该安全吊钩与“抽油杆上卸扣器”配套使用 。
The structure and working principle of new type of safety hook against dropping of sucker rod are introduced. Combined use the hook and break out device can practise semi-automatically operation for breaking out sucker rod.
出处
《安全、健康和环境》
2002年第7期7-8,共2页
Safety Health & Environment
