After been used for 3-4 months, the crucible had serious crack at the joint of the bottom and side closing to the outer flame.
镁合金热室压铸机所用坩埚在使用3 ~ 4个月后在靠近外焰的底部和侧面结合处发生严重的变形开裂，对开裂原因进行了分析。
Move flame back and forth as alloy is drawn into joint. When the proper temperature is reached alloy will flow readily into space between tube outer wall and valve socket.
达到适当的温度后，合金将迅速容易地流进管道外壳和阀门套管之间的空间。
Adjustment of the combustion flame, the outer edge of the bottom of the pot so that it would not exceed, the best heating effect.
调整火苗的燃烧范围，使其不超过锅底外缘，取得最佳加热效果。
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