The FV-4M1 should be mounted only in a vertical position as its operation is based on the vertical movement of the float (see Fig. 3).
排气阀FV-4M1只能采用直立安装方式，因为其工作原理是以浮子垂直上下运动为基础的（参阅图3）。
OBJECTIVE: to evaluate the differences in brain activation in response to presentation of the patient's own name spoken by a familiar voice (SON-FV) in patients with VS and MCS.
目的：评价以熟悉声音呼唤植物状态和最小意识状态患者的名字时患者脑内反应的差异。
Moreover total virtual alternation force of the entities is the vector sum between all intersected cubes on two kinds of FV and ee basic contact modes.
而其实体的总的虚拟交互力是在FV和EE两种基本接触模式下所分割的所有立方体间的矢量和。
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