Abstract: Effects of vacuum degree and filling temperature on the casting length of A356 aluminum alloy wire prepared by vacuum suction casting were investigated.

摘要：采用真空吸铸法制备了A356铝合金丝材，并对充型温度和绝对真空度对丝材长度的影响进行了研究。

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There are many factors affecting the characteristics of the suction-type metering device for precision drill. The important one is the vacuum degree or suction power of the vacuum chamber.

影响气吸式排种器排种性能的因素很多，而决定吸力的吸室真空度是很重要的因素。

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Allows a high degree of vacuum suction on the Hs is p1 pressure pump at the entrance to allow the greatest vacuum.

允许吸上真空高度Hs是指泵入口处压力p 1可允许达到的最大真空度。

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