这是保证FRP容器长期安全使用的技术关键。

This is a technical key for ensuring long time safety and obtaning good economic socieal benefit.

youdao

在玻璃钢管道系统铺设中选用合理的安装措施，不设置膨胀接头，也能保证管线长期安全使用。

The long-term safe usage can be kept without expanding joint in the FRP pipe system if rational assemble measures are selected.

youdao

因此，我们不知道长期使用雷公藤所起的作用有多好，也不知道它是否安全。

So we don't know how well TwHF extract works over the long term, and we don't know whether it's safe.

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