北京11选5开奖结果

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The difference between the blower and roots blower, roots vacuum pump
Time:2016-10-09    Frequency:665
The three blower roots blower, vacuum pump and roots difference is that due to the requirements of sealing structure, material of different constraints, the original has a blast blower function, roots vacuum pump only has ventilation function, and the blower is both blast and ventilation function
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Service Hotline:400-611-8030 Tel:0531-80653233 Phone:
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