safety hook

基本解釋

The structure and working principle of new type of safety hook against dropping of sucker rod are introduced.
介紹了新型抽油桿防脫安全吊鉤的結(jié)構(gòu)和工作原理。
One end of the draw rod fixedly connected with the outer end of the telescopic rod is connected with a safety draw hook.
所述的伸縮桿的外端固定連接有牽桿，在該牽桿的端部連接有保險牽引鉤。
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The bulb has four LEDs, a switch for high or low settings, and a safety hook for hanging. It's rainproof and impact-resistant, and rated from minus 4 to 131 degrees.
這種燈有四個LED燈泡，一個調(diào)節(jié)光亮的開關(guān)，一個防雨罩和一個避震，并且可在零下4度到131度的環(huán)境中使用。

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Jurors ultimately let Bell off the hook, after hearing that the helmet complied with federal safety regulations.
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It gets them off the hook, it provides Arena with a another legitimate argument for the safety of lorcaserin and the opportunity to further prove the lack of human risk.
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