step roller track 梯级导轨
step roller rail 梯级滚轮导靴
by step roller spot welding 步进式滚点焊
roller step bearing 滚柱止推轴承 ; 止推滚柱 ; 滚柱止推
escalator step roller 求购自动扶梯一步辊
axis of step roller 梯级主转轮轴
step by step roller 步进轧机
Aid-roller step control system 助卷辊踏步控制系统
The large size diameter of step roller operates minimizes the noise and prolongs the product life.
大直径的梯级滚轮，运行平稳，噪音更小，寿命加长。
One's life should be like a road roller, every step can leave deep footprints.
人的一生应该象压路机一样，每走一步都能留下深深的脚印。
The method allows for directly compressing the blend without the need for a granulation step or roller compression.
本方法允许直接压制混合物而不需制粒步骤或辊压。
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