Flat versions allow sediment and particles to sweep past the measurement surface, minimizing risks of abrasion, breakage and coating.
平面型允许沉淀物、微粒掠过测量面，并可把擦伤、损坏和镀膜的危险降到最小。
Caster wheels are made of superior polyurethane with strong abrasion resistance, various types such as flat bearing wheel and climbing wheel.
脚轮选用优质耐用的聚氨酯脚轮，耐磨性强，平地轴承轮，爬坡电梯轮，种类齐全。
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