A device used to hold plugs until they are released and pumped down the casing during cementing operations.

一种装置，用于在注水泥作业过程中悬挂胶塞，直到将其释放并在注水泥作业中沿套管内泵入。

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Using a key combo: turn the device off, then turn it on and immediately hold down the relevant key combination for your device.

使用一个键组合：关闭设备，然后打开它，并立即按住您的设备的相关密钥组合。

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To do this, go to the Home screen and hold down ALT while typing 'LGLG. ' This retrieves a long list of numerous confusing codes representing the functions that were performed on your device.

回到主屏幕，按下Alt键的同时输入“LGLG”，就能获得一长串让人迷惑的代码，这些代码表示你在手机上操作过的功能。

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