砥粒依其表面分布,可分为疏砂(Open coated)(砥粒占基材面积50-70%)及密砂(Closed coated)( 砥粒100％覆盖基材)等二种.疏砂易将研磨所产生的屑粉排除,适用于木材的手工研磨,密砂则适用于涂膜的机械研磨.
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To provide a rinse solution to achieve the closed loop system, which will remove dragout, enabling high paint usage and resulting in clean coated products.
为闭路冲洗系统提供清洗液，冲洗掉由电泳槽中带出的浮漆，提高油漆利用率，从而得到清洁的产品。
This coated inner tube is closed at one end and sealed at the other end to the outer tube.
内管的涂层是介于一端与另一端的外管的密封层里面。
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