light quality短语¹³¹⁶²⁰⁺³ 基本例句 光质 It has the advantage of the heavy quality refractory and the light quality and has the higher strength, high temperature resistant, low physical volume density and low heat transmit rate. 它集重质耐火浇注料和轻质隔热浇注料的优点于一体，既具备强度高、耐高温的机械性能，又具备低体积密度、低导热率的隔热性能。 cnki