注意：管径越大，工作压力越小。
Pay attention: the pipe diameter is bigger, the pressure is lower.
能满足各类管道系统的管径需要。
Which can meet various needs of the diameter in pipeline system.
确定管径是给排水规划的一项重要内容。
Determining the diameter of drainage pipe is an important work in city planning course.
由于该泵进口管径合理，故其必须吸入压力较低。
这是小管径、低流速系统测量方法上的一个突破。
We think this is an important break-through in testing lower flow velocity in tiny tube .
在MSCTU条件下，测量输尿管正常管径的大小。
管子长度要短，管径要合适，流速过高会损失能量。
The length of tube should be short and tube O. D. should be suitable.
复杂的管道可采用建立背压的方法进行清管、测径。
Complex pipe can be established by the method of back pressure pigging, caliper.
清管和测径的施工过程完全相同。
开关可以安装在异径三通管，标准三通管或焊接管件上。
Flow switch can be installed in a reducing tee, standard tee or welded fitting.
开关可以安装在异径三通管，标准三通管或焊接管件上。
Flow switch can be installed in a reducing tee, standard tee or welded fitting.
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