粘土砂湿型铸造，铸件表面容易产生粘砂。
It is easy to adhibit sand on the surface of the casting in the foundry using green sand mold.
在粘土砂型铸造生产过程中经常出现夹砂类缺陷。
In casting iron production casting iron scab flaw is often found.
某厂采用粘土砂湿型生产拖拉机铸件，也遇到了铸件表面粘砂的问题。
The factory falls across this question in producing the castings of the tractor.
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