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N the sloping surface on both sides of a segmental arch that takes the thrust 拱座
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The skewback bearer will be directly heated by gushing flame when tuckstone end dropped happens, which threats the safe run of the furnace and causes heavy oil consumption up.
熔窑挂钩砖头部掉落后，冒出的火焰直接烧托铁板，严重影响熔窑的安全运行，同时使重油消耗增加。
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