Discusses the problem about the water flow control of primary pipe network when consumers randomly regulate water flow.

探讨了当热水供暖系统用户侧流量随意调节后一次网流量的调控问题。

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Into the tail flue of fly ash due to the low temperature, has a certain hardness, so primary heating surface with flue gas exhaust pipe, the wear and tear on the wall.

蒸汽锅炉进入尾部烟道的飞灰由于温度较低，具有一定的硬度，因此随烟气初级受热面排管时，会对管壁产生磨损作用。

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Discusses the selection of floor area and heat release per unit floor area for heating pipe laying, and presents some primary Suggestions for project design.

探讨了敷设加热管的地面面积和单位地面面积散热量的选取，提出了初步建议，供设计时参考。

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At 8:20 p.m. on the day of the explosion the pressure data suggest there was a constant flow of sea water being pumped into the drill pipe that was displacing the heavier mud system which was the primary pressure control for the well.

WSJ: The Oil Disaster Is About Human, Not System, Failure

Yet this situation seemed a pipe dream not so long ago: Iraq's security forces, serving an elected government, assume primary responsibility for the good order of their own country.

CENTERFORSECURITYPOLICY: Bye-bye, Babylon

Thus, the primary issue in the case is whether Cuban entered into an agreement with the company to maintain the confidentiality of the PIPE and not to sell his shares in Mamma.com during the course of these conversations.

FORBES: Twists, Turns, PIPEs, And Screws: Insider Trading And Mark Cuban