Protection of business logic assets by shielding from low-level technology change.

通过屏蔽底层技术变更来保护业务逻辑资产。

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Shielding performance and test methods of protection material against X-rays.

X射线防护材料屏蔽性能及检验方法。

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Shielding performance and test methods of protection material against X-rays.

X射线防护材料屏蔽性能及检验方法。

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