operating free-air temperature range的中文?

operating free-air temperature range的中文? “free air temperature range”指的是什么参数? temperature range (in the operating systems的中文意思 free range farming是什么样的农业? operating and storage junction temperature air free 郭老师您好! 请问超声波发音器的rated frequency range与operating frequency有什么 ambient air temperature是什么意思? free-stream temperature是什么意思? 发动机冷却系统 minimum operating block coolant temperature 这句话的含义是什 net operating working capital 在财务管理里中文是什么意思?free cash