要得到优质的铸件，整个系统的这一部分是非常重要的，而且在设计浇注系统时应视为同样优先考虑的事和值得注意的事项。
This part of the system is essential to achieving quality castings, and should be given the same priority and attention as designing the gating system.
第七步设计排气和溢流系统。要得到优质的铸件，整个系统的这一部分是非常重要的，而且在设计浇注系统时应视为同样优先考虑的事和值得注意的事项。
Step 7. Design the Vent and overflow system. This part of the system is essential to achieving quality castings, and should be given the same priority.
青岛和德隆机械有限公司专业生产各类优质铸件和铸造机械，是具有自营出口权的外向型企业。
Qingdao Hedelong Machinery Co. Ltd is an self oriented enterprise with export license, witch is engaged in the high quality castings and the foundry equipments.
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