That is not as easy as it sounds, because the only control typically supplied by the machine builder is a coolant flow valve, and often that valve is not designed for accurate flow control.
这可不像听起来那么容易，因为设备制造者在这方面的唯一控制就是冷却水阀，而且这种阀控制常常涉及得不够精确。
A self-made gas flow cell is used as the IR absorption cell. The components to be analyzed can be trapped with only one fourway valve.
IR吸收池是自制的气体流通池，只用一个四通阀即可将待测组份截留在吸收池中。
Check valve before the valve is to use the pressure after poor hoist the automatic valve, it is the role of the media flows only in one direction, reverse and stop its flow.
止回阀是利用阀前阀后的压力差而自动启闭的阀门，它的作用是使介质只做一个方向的流动，而阻止其逆向流动。
A hinged valve that permits fluids to flow in only one direction and clacks when the valve closes.
一种铰接的阀，只容许流体单向流动，关闭时发出卡嗒声。
Welding type high pressure check valve is only allowing media to flow in one direction, and stop the flow direction.
焊接式高压单向阀只允许介质向一个方向流动，而且阻止方向流动。
With this new concept, the electro-hydraulic proportional valve that can control only pressure or flow has multifunction to control both pressure and flow-Two appplication examples are also presented.
理论上，如果有实用的动态流量传感器，用一控制阀口开度的电液比例节流阀，再配以压力和流星传感器就可控制这两个县。因目前还没有实用的动?。
The check valve avoids refluence of air in pipe - lines and consequent pressure loss in which compressed air is intended to flow in one direction only.
单向阀能防止管路中的空气回流，以及随之而来的因压缩空气朝这一方向流动而产生的压力损失。
The check valve avoids refluence of air in pipe - lines and consequent pressure loss in which compressed air is intended to flow in one direction only.
单向阀能防止管路中的空气回流，以及随之而来的因压缩空气朝这一方向流动而产生的压力损失。
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