本文介绍安全栅的基础知识，闸述了正确选用安全栅，以及安装和在现场调试安全栅时的注意事项。

This text introduces the foundation knowledge of the safe grid, the said the exactitude chooses to use the safe grid, and install with adjust to try the announcements of safe grid hour on the spot.

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介绍一种经济实用的、制作简易的钻井泥浆液井涌井漏报警仪。文中分述了它的工作原理、安装方法、调试方法以及可能达到的技术状态。

One kind of simple and easy make alarm for well kick and mud loss is presented. Its work principle, installation, calibration and performance are introduced.

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所 述的喷嘴本体进口段内开有与泡沫发生器相配合的安装孔。

The inlet segment of the nozzle body is internally equipped with a mounting hole which is engaged with a foam generator.

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