闭路二级脱水工艺
closed-circuit two-stage dehydration process
过[氧]二碳酸二（二级丁酯）
di-sec-butyl perdicarbonate; di-sec-butyl peroxy-dicarbonate
di-sec-butyl peroxy-dicarbonate
di-sec-butyl perdicarbonate
平面二级倒立摆
planar double inverted pendulum
Planar inverted pendulum
高等级公路路面抗滑石料
highway pavement stone sliding
城市沥青道路路面
city bitumen road surface