轴式吊耳强度计算及壳体局部应力校核方法2. Bollmann extractor 立式吊篮(波耳曼)萃取机3. Attached to the outside of the ladle are heavy trunnions by means of which it is lifted by an overhead crane. 铸桶外壁装有很重的耳轴,靠它可用天车把铸桶吊起来。