空心管子
The spray pipe is a ring hollow pipe body, and the through spray orifices are alternatively distributed around the spray pipe.
所说的喷管为环形中空管体,贯通的喷孔沿喷管的圆周间隔分布。
Desalination is carried out by simply lowering into the ocean a long, hollow pipe capped at the lower end by a semipermeable membrane.
用一根长空心尼龙管插入海水里,并用半透膜封住较低的一端来进行海水淡化。
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