底板加热器风扇控制开关
floor heater fan control switch
电子控温加热板
Electronic temperature control heating plate
厚板加热炉
heavy plate heating furnace
加热板式塑料管对接焊
heating element butt welding of plastic pipe
宽厚板加热炉
wide and thick slab furnace
太阳能吸热板加工工艺
The making process for Solar Absorber Plate