However, the opacity of the metal mould and the high metal pressure during casting make the mould filling process very hard to be directly and visually evaluated.
然而，由于金属模具的不透明性和熔融金属的高压使得很难对充型过程做出视觉化评估。
The key basic technology in full mould casting process includes: material and formation of pattern, coating, vibratory fill of moulding sand as well as molten metal filling.
实型铸造法的关键基础技术包括：模样的材料及成形、涂料、型砂的振动充填、金属液的充填。
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