n. tubulation
常用的试验方法为静水试压，即：向封闭的管段充水，然后把管段升压至规定压力，检查是否泄漏。
A common approach is hydrostatic testing-filling a closed pipeline section with water, then pressurizing the line to a specified pressure to check for leaks.
管段接头是沉管隧道的重要环节。
用气管段酚红法研究其祛痰作用。
Tracheal phenol red test was conducted to investigate the effect of phlegm expelling.
应用推荐