High temperature, high dust, high moisture, strong corrosion and explosion proof are five difficult problems in designing sam pling and pretreatment system for process gas analysis.

• 高温、高粉尘、高水分、强腐蚀性和防爆是过程气体分析中取样预处理系统设计的五大技术难题，它们既密切相关，又相对独立。