1) throttling principle
节流原理
2) Orifice throttle principle
孔板节流原理
3) crude joint
原生节理
1.
The result of observing demonstrated that crude joint and crack of lower top coal were much more developed than integrated upper top coal in front .
19 m)的原生节理裂隙比较发育,上位顶煤(2。
4) energy-saving principle
节能原理
1.
Taking the double horse head type,offset-wheel type,swingrod type and downward beam balance weight type as the searching objective,firstly structure designing and energy-saving principle of the four types of beam-pumping unit are analyzed,then their performance are contrastively analyzed at the same condition,referring as offset pumping unit with comparative analyzing.
以双驴头、偏轮式、摆杆式和下偏杠铃式游梁节能抽油机为研究对象,给出了4种抽油机设计结构及节能原理;然后在同一工况下,以偏置式抽油机为参照,对比分析了4种节能抽油机的节能效果。
2.
The actual states of China\'s energy-saving doors and windows,the energy-saving principles and technologies of the outside doors and windows were discussed,as well as the design measures to ensure energy-saving effect of the outside doors and windows in the building.
探讨了我国节能门窗发展的现状、外门窗的节能原理、建筑外门窗的节能技术,以及为保证节能效果外门窗在建筑中的设计手法等。
6) water saving principle
节水原理
补充资料：节流
节流
Throttled flow
节流(throttled flow) 节流是强迫流过一个限定面积，在那里流速一定会增加的流动。流过这个收缩区时，由于压力下降而产生的动能通常由于涡旋扰动大部分转换为热能。其结果是这个系统中的机械能损失。例如采用一个球形阀门来节流气体时，阀门下游不远处的速度在大多数情况下只比节流截面前稍大一点。这是一个等烩过程。由于节流阀把机械能损失引入流动系统，而使流量可得到控制。参阅“等嫡过程”(i*n-tropic proeess)条。 当气体以声速流过诸如喷管那样的收缩段时，便产生一种特殊的节流效应。此时，进一步降低下游压力不会改变上游状态，同时流量保持常数。 〔斯特里特(v.I砂.Streeter)撰二
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参考词条