例句與用法

1. the surface fire and bottom fire apply separate burning poles, the gas and air is mixed in certain proportion and feeding into the burning pipe by fan
   面火，底火各用一根獨立的燃燒棒，利用風(fēng)機把燃?xì)?、空氣按適當(dāng)比例混合后送入燃燒管內(nèi)。