英语语法分析

The main materials it sells include fire hydraulic giant, fire hose, indoor and outdoor fire hydrant, firebox 1211 and 302 fire extinguisher, etc.

它卖的主要材料包括：火液压巨头、灭火水龙带、消防水带、室内外消防栓、1211消防箱、和302灭火器等等。

The firebox is full of smoke, the fire needs more air?

火箱子全是烟，还需要更多空气助火势？

Pulverized coal fired boiler in the firebox usually must be equipped with wind flow meter.

燃用煤粉的火室燃烧锅炉一般应装有入炉风量表。