呼吸区域 meaning in Chinese

breathing space

Health and safety in welding and allied processes - sampling of airborne particles and gases in the operator ' s breathing zone - sampling of gases
焊接及相关工艺的卫生与安全.操作人员呼吸区域内空气中悬浮颗粒及气体的抽样.气体的抽样
Health and safety in welding and allied processes - sampling of airborne particles and gases in the operator ' s breathing zone - sampling of airborne particles
焊接和有关过程的卫生和安全.操作者呼吸区域的空气悬浮颗粒和气体的取样.空气悬浮颗粒取样