重水减速剂water moderator 水减速剂
缓凝型减水剂
Retarding and Water-reducing Admixture
差动式无级变速减速
Differential type stepless variable moderator
大扭矩低速减速器设计
Large Momont and Low Speed Reducer Design
高水速凝材料
High water quick-setting material
high water acceleration setting
加速、减速
Accelerating and Decelerating
加速减速试航
acceleration-deceleration trial