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锌铝系合金铸造时出现反常的底部缩孔,而用一般上置式冒口对此类缩孔的补缩效果甚微。
There is abnormal bottom shrinkage in Zn Al alloy castings and top riser has little effect on them.
youdao
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锌铝系合金铸造时出现反常的底部缩孔,而用一般上置式冒口对此类缩孔的补缩效果甚微。
There is abnormal bottom shrinkage in Zn Al alloy castings and top riser has little effect on them.
youdao