The deficient tuyere with chop and change of temperature often causes block dropping.
风口暗淡不活，凉热变化无常，经常出现下大块。
I choose a block of marble and chop off whatever I don't need.
Auguste Rodin我挑选一块大理石，去掉我不需要的部分。
I choose a block of marble and chop off whatever I don't need.
Auguste Rodin我挑选一块大理石，去掉我不需要的部分。
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