直径长度 meaning in Chinese

dl diameter length

Diameter of cylindrical screen length mm
筛筒直径长度
Three diameters of straight pipe are required on the valve outlet
阀门出口处需要配置三倍直径长度的直线管路。
The bridge is two leg diameters high and is not self - heating
这种连桥有两段直径长度那么高，并且不会自行发热。
If a balancing valve is located downsteam from a circulation pump , allow a distance of ten ( 10 ) diameters between the pump and balancing valves
如果平衡阀位于循环泵的下游，则泵和平衡阀之间的距离要有10倍的管道直径长度。
On the downstream side , no fitting should be closer than 21 / 2 pipe diameters from the flow measurement device . ( five pipe diameters are preferred
在下游段，距离流量测量装置2 . 5倍管道直径长度内不应该有连接件。（最好是五倍管道直径长度内）。