The preparation method is simple, has small equipment tonnage required, short demoulding time and low cost, and has no strict requirement on the die.

本发明制备方法简单、所需设备 吨位小、脱模时间短、对模具没有严格要求及成本低廉。

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This means that as long as increase in size and precision, larger tonnage of forming equipment, very expensive and high precision dies would be required.

随着锻件尺寸和精度的提高，需要更大吨位的成形设备和非常昂贵的、高精度的模具。

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Tugboat operation is the important part of the service system of the port, the rational marshalling of equipment directly affects the number and tonnage of the vessels arrived at the port.

港口拖轮作业是港口服务系统的重要组成部分，拖轮的合理配置直接影响着到港船舶的数量和吨位。

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