Here we first talk about how to regularly test and inspection of anti-falling safety Quanqi, with SC type construction elevator as an example.
这里我们先来讲讲如何定期试验和送检防坠安全器，以SC型施工升降机为例。
Here we first talk about how to regularly test and inspection of anti-falling safety Quanqi, with SC type construction elevator as an example.
这里我们先来讲讲如何定期试验和送检防坠安全器，以SC型施工升降机为例。
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