气瓶阀提供对气源的开启和关闭作用,设有过压保护膜片,当气瓶内的压力超过额定工作压力的 发布时间:2018-03-23 19:18 │ 来源:www.tikuol.com 题型:单项选择题 问题: 气瓶阀提供对气源的开启和关闭作用,设有过压保护膜片,当气瓶内的压力超过额定工作压力的()左右时会自动卸压。A.15%B.16%C.17%D.18%
题型:单项选择题 _______ found by the police, the killer had to hide themselves in a mountain cave for two months.A.In order to not beB.In order not to beC.So as not to beD.So as to not be 查看答案