boiler band joint piece 锅炉带圈接合板

boiler band joining bolt 锅炉带圈连接螺栓

boiler band joining eye bolt 锅炉带圈连接眼螺栓

boiler lagging band 锅炉外壳箍

boiler lagging plate band 锅炉外套板箍

boiler lagging plate band lug 锅炉外套板带头

Boiler jacket band [铁路] 外卡带

boiler wedding band 锅炉箍圈

band boiler 带式加热器