自动注脂泵（2/3/4）
合金钢制环模（20CRMNTI）
上压盖
固定座
齿轮减速器
High-hardness roller shell adapts to heavy-load working condtions of 560 model equipment to extend roller service life (High-hardness roller shell adapts to heavy-load working conditions of 560 model equipment to extend roller service life)
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