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怎么才能测量这段管道是否有堵塞的问题? |
点评
https://www.amazon.cn/dp/B0BN16V95L/ref=zg_bs_121959071_sccl_2/458-1206367-7835248?th=1
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点评
挖槽,电焊可以实现,但是成本高
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