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Study on building gypsum retarder of bone glue protein .

骨胶蛋白质石青缓凝剂的研究。

Evaluation of retarder to automobile braking stability .

缓行器对汽车制动稳定性影响评价。

The push equipment , which includes engine , retarder and screw , offers forward power for airship .

推进装置包括发动机、减速器和螺旋桨，为飞艇提供前进动力。

Detecting method of retarding effect of s-type retarder for plaster .

s型石膏缓凝剂缓凝效果的检测方法。

Annual maintenance : replacing the gear oil for the retarder , and fill the braking electromagnet base with lubricant .

年保养：减速器更换齿轮油，制动电磁铁座加注润滑油。