low smoke短语¹³¹⁶²⁰⁺³ 基本例句 低烟 With changing the proportion of CPVC/ PVC, the properties of the blends were studied, including the aspect, thermal, flame- retardant, low smoke and mechanical properties. 通过改变 CPVC/ PVC的树脂组成，研究了共混物的外观、耐热性、阻燃消烟性以及物理力学性能。 chemyq