LECA lightweight grass paving block is useful for the grass or hydro seeding due to the grass can be alive in the slot and keep the soil slope stable.

陶粒植草砖可稳定斜坡泥土不会下滑，因砌块中空部份可使小草在内生长，起稳固作用。

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There is a deep step on the slope of the novel camshaft of brakes or the lowest place of the slot.

一种新型制动器凸轮轴，凸轮轴的斜面或者凹槽的最低处有深台阶。

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