阐述了泵入平衡压力式泡沫比例混合装置的工作原理，提出了该装置的设计方法，并对关键部件作了简要分析研究。
The principle of the foam pump pressure balanced proportioning unit is discussed in this thesis. The design method of it also be talked, and it's main parts are analyzed and researched.
本文主要介绍压力比例混合器的原理、理论计算，着重论证了压力比例混合器混合比的无级自动调节。
Briefing the principle and theoretical calculation in respect to the pressure proportioner, priority is given to the explanation of its stepless automatic adjustment.
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