求翻译：5. 如果镜片没有破裂，则装上车镜，镜片朝上，将质量为 900g 的钢球从 1.0m 高度下落到车镜的几何中心处，在镜片断裂后,镜子表面的碎片重量不得超过1g；（图2）是什么意思？

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If there are no broken lenses . * 5, was loaded on the car mirrors, lenses, which will be the quality of 900g of steel ball from 1.0 m high whereabouts to Auto mirror the geometric center, mirror, on the lenses after fracture surface debris weight shall not exceed 1 G; (Figure 2)

5. If the lens have not burst, then installs the vehicle mirror, the lens face on, the quality is the 900g steel ball from the 1.0m highly whereabouts to the vehicle mirror geometry center, after the lens break, the mirror surface fragment weight does not have to surpass 1g; (Figure 2)

5. If the lens not broken, then loaded aboard mirrors, lenses facing up, quality of 900g steel balls from 1.0M height to the car at the geometric centre of the mirror landing, in lens after the break, debris on the surface of the mirror weight shall not exceed 1g; (Figure 2)

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