在排水管附近水平流动的假设不成立。
The assumption of horizontal flow in the vicinity of the drains fails.
公司引进具有国际领先水平的给、排水管材管件及电工套管生产、检测设备和技术。
The company has introduced international advanced level of the drainage pipe casing pipe fittings and electrical production, testing equipment and technology.
公司引进具有国际领先水平的给、排水管材管件及电工套管生产、检测设备和技术。
The company has introduced international advanced level of the drainage pipe casing pipe fittings and electrical production, testing equipment and technology.
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