Results There was no obvious difference in the stability of anesthesia and adaptability of machinery ventilation between 2 groups.
结果两组麻醉的稳定性和机械通气的适应性无明显差异；
Two European companies — Germany's Wirth and Italy's Seli — supplied tunnel-drilling machinery and ventilation equipment.
两家欧洲公司——德国Wirth和意大利seli为这项工程提供了隧道钻井装备以及通风设备。
Two European companies -- Germany's Wirth and Italy's Seli -- supplied tunnel-drilling machinery and ventilation equipment.
两家欧洲公司--德国Wirth和意大利Seli为这项工程提供了隧道钻井装备以及通风设备。
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