快3彩票
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供实验室测定型芯砂的透气性，本仪器用于型（芯）砂在干（湿）态时透气性值的测定。主要技术参数１、使用标准试样∮５０*５０mm２、气钟容量２０００ml３、气钟压力１０００Ｐa４、气孔规格 大孔 1.5mm 小孔 0.5mm５、微压表压力范围０～１０００Ｐa６、压表透气性范围 大孔 ５０～２４５０ 小孔 ０～５０
