也许是中央空调以前也经常带水又是在下水道里或是水管井道里焊接。
Perhaps is the central air conditioning water is also often used in the sewer or pipe hole welding.
在大量管井施工及运行调查的基础上，提出了我国新的供水管井井水含砂量标准。
Current situation of well Water sand content standards inside and outside China is outlined here and some differences and arguments for this issue are studied. Based on the great amount o...
本文根据实践与测试认为，供水管井过滤器直径、长度的确定，按“入井流速”计算不合理。
It is deemed that choice of well screen 's diameter and length of a water well according to the inflow velocity to the well as did by some professional agencies traditionally is not reasonable.
固体燃气洗井器是根据国家专利技术“旋喷式快速洗井器”原理，设计研制的一种新型地下水管井快速洗井器。
The solid gas-burning well-washing equipment is a new kind of device for well-washing, which was designed based on the national patented technology of the rotary spraying washing device.
固体燃气洗井器是根据国家专利技术“旋喷式快速洗井器”原理，设计研制的一种新型地下水管井快速洗井器。
The solid gas-burning well-washing equipment is a new kind of device for well-washing, which was designed based on the national patented technology of the rotary spraying washing device.
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