The ERF has no obvious effects on sound insolating in moderate or high frequencies, but has apparent effect on th. . .
无论对声传播还是声激振动,电流变材料的影响都是随频率变化而变化的。
The utility model is characterized in that an insolating hood, a storing cabinet and a water heater control box form an integrative structure.
本实用新型的特点在于把保温罩、存物柜、热水器控制箱等组合成一个整体。
简答网 · 高考英语
简答网 · 双语娱乐资讯
简答网 · 初中英语作文