Shenwu puts up the initial investment to install a heat exchanger that preheats the air going into the furnace, slashing the client's fuel costs.

申武投资初期安装了一个热交换器，将进入炉内的空气预热，降低了客户的燃料成本。

The inspection preheats sparking plug condition.

检查预热火花塞状况。