洁净空气的吸引力渐渐退去，高薪也大大地被国外的高生活标准抵消了。
The attraction of clean air wears off, and the higher salary is largely offset by the high living standards in foreign countries.
组合框架梁直用于住宅钢结构中，能起到减小框架梁梁高，增加建筑净空的作用。
The composite frame beams can reduce the height of frame beam and increase the headroom of the building in steel structure of residence.
GI型高真空蝶阀用于接通或切断真空管路中的气流。适用介质为纯净空气和非腐蚀性气体。
GI high vacuum butterfly valve is used to put through or cut off the airflow in vacuum pipeline. Applicable medium can be pure air and noncorrosive gases.
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