Based on the formation mechanism of penetration, the reason causing penetration defects of V-process castings was analyzed with considering the features of vacuum moulding process.
结合铸件粘砂机理，从V法铸造的成型特征上分析V法铸造铸件的粘砂原因。
The vacuum squeeze moulding technique is a new technology for compacting moulding sand.
真空压实造型技术，是一种新的型砂紧实工艺。
The moulding of the case utilizes the technology of full-vacuum braze welding for satisfying the sealing requirement.
为更好的满足密封要求，机箱采用了整体真空钎焊技术进行制造。
This together with the long lifetime of the vacuum pumps make them suitable for use in medical technology, wax moulding in the jewellery industry and ceramic kilns in the dental industry.
加之真空泵使用寿命长，使其适用于医疗技术、珠宝业蜡模和牙科业烤瓷炉。
This together with the long lifetime of the vacuum pumps make them suitable for use in medical technology, wax moulding in the jewellery industry and ceramic kilns in the dental industry.
加之真空泵使用寿命长，使其适用于医疗技术、珠宝业蜡模和牙科业烤瓷炉。
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