... retarder slug；减速器嵌片[标记片] retarder status；减速器状态 retarder status screen；减速器状态萤光屏 ...
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This article briefly introduces the advantages of using retarder and its working principle, analyzes the current status of using retarder on the bus and coach and the attention points in the using.
简述缓速器的工作原理以及使用的好处，并分析当前我国客车使用缓速器的现状以及使用过程中应该注意的事项。
The application status of phosphogypsum is presented. Some processes of producing cement retarder by phosphogypsum including author's experimental process are introduced.
简要叙述了磷石膏利用的基本概况，介绍了几种各具特色的磷石膏制水泥缓凝剂的生产工艺流程，以及作者的实验流程。
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