加强砂芯排气能力。
分析了用消失模涂料透气性评价实际涂层排气能力时的局限性。
The coating permeability in evaluating gas exhausting ability of actual coating wafer is indirect and limited in lost foam casting.
示范20卷，是一个较小的助推器气动装置的高流量和排气能力的能力。
The Model 20 Volume Booster is a smaller pneumatic device capable of high flow and exhaust capacity.
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