boarding place along the top of a dam to increase its height 同义词：flashboarding,
例句与用法
1.
Feeding mechanism : up roller , middle flashboard and down bell jar or double bell jar feeding mechanism with hydro - automatic drive , featured as easy operation , convenient maintenance and good air - tightness 加煤机构：液压驱动自动加煤装置，采用上滚筒中插板下钟罩机构或双钟罩结构，操作简单，维修方便，气密性好。
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