air extraction短语¹⁴⁴⁹⁷²⁺² 基本例句 un.抽气；🌏空气通风口；排空气；人造树或者叫空气提取 Presents general principles and forms for the design and selection of air-conditioning and ventilation system, involving kitchen air extraction and spot fresh air supply systems. 阐述了宾馆酒店厨房通风空调设计的一般原则及通风系统的采用形式，包括排风系统、岗位新风的设计。 cnki