The plastic pipe can rotate freely after installation.

即使安装以后，塑料管体也可任意转向。

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The utility model is suitable for testing the plastic pipe in the hydrostatic test and the blasting test.

本试验装置适用于静压试验和瞬间爆破试验检验塑料管材。

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When the pressure is greater than the standard of the plastic pipe, the pipe will break, slurry and cement will escape from the pipe and pollute the mine.

当料浆的自然压力大于塑料管的耐压值后，便可使塑料管破管，从而使生产中断，浪费大量水泥、尾砂，并造成井下污染。

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Neighbor Michael Creel said Dykes put the plastic pipe underground from the bunker to the end of his driveway so he could hear if anyone drove up to his gate.

NPR: Ala. Town Mourns For Bus Driver Amid Standoff

Negotiations are being carried out between the suspect and authorities through a 60-foot plastic ventilation pipe that leads from the bunker, authorities said.

CNN: Amid standoff, Alabama town mourns slain bus driver

For days, officers communicated with Dykes through a plastic pipe that rose up from the bunker, which was similar to a tornado shelter and apparently had running water, heat and cable television.

NPR: FBI: Ala. Captor Rigged Bunker, Waged 'Firefight'