sand inclusion

基本解释

The sand inclusion glass fiber reinforced plastic pipe takes thermosetting resin as base body, take glass fibre and its products as reinforced material.
玻璃钢夹砂管道（以下简称夹砂管）是玻璃纤维与合成树脂及石英砂的复合体。
A description was made about the method to distinguish two kinds of sand inclusions caused by different reasons and how prevent sand inclusion by improving sand quality control and foundry method.
论述了铸铁件中两种不同成因的砂眼的判别方法及如何从型砂品质管理和工艺改进来防止砂眼的措施。
The reasons causing sand inclusion and slag inclusion are: ( 1 ) gaps between mould and core prints or cods too small;
前言：湿砂型铸铁件产生砂孔和渣孔缺陷的主要原因是：（1）芯头或砂台的间隙偏小；