这时我们选择适合制作沟槽管的涵管机。
At this time we choose suitable for the production of the tube he slipped end-over-end machine groove.
本文提出了一个半圆型垂直沟槽管冷凝传热的物理模型。
New physical models of condensation heat transfer on semicircle type corrugated surfaces were presented.
北京金福星管道设备有限公司是一家专业生产、销售沟槽管件的综合性公司。
Beijing Fuxing the pipeline Equipment co., Ltd. is a professional production and sale of the pipe trench integrated companies.
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