Despite the geographic separation of the families, the method of quadrupedal walking is similar: legs and arms held fairly straight, and bottom in the air.
尽管这些家庭分布在不同的地域，但是用四肢行走的方式极为相似：两腿和两臂支撑很直，而末梢均朝向空中。
Separation of water and gas is reliable (water vapor enters from bottom of valve by the U general type), remain the state of water sealing in the valve, effectively prevent leakage of steam.
汽水分离可靠（水汽经U型普通从阀底部进入），阀内始终处于水封状态，有效阻止蒸汽泄漏。
The separation efficiencies of a cyclone with different lengths of vertical tube and bottom air extractions were studied by experiments.
对不同直管长度以及直管底部有少量抽气时不同抽气率对旋风分离器的分离效率的影响进行了实验研究。
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