... 速率变动 speed fluctuation 速率表 speed gage 速率调节装置 speed governing device ...
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digital multipurpose wind speed gage 多功能数字风速仪
The overflow tank level and the speed of both the role of Chip can be changed by changing the factors such as the nozzle inlet pressure, drill gage width, nozzle diameter of the PDC bit.
改变喷嘴入口压力、钻头保径宽度、喷嘴直径等影响因素对改变井底漫流层和排屑槽内的速度都有作用；
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