求翻译：恒定腔型的设计理念，是衬板在破碎磨损的情况下腔型形基本保持不变，保证高效破碎效率，从而实现衬板同步磨损，避免了衬板局部的恶意损坏，达到衬板的磨损率一致，延长了衬板的使用周期。是什么意思？

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Constant cavity-design philosophy, which was worn in shattered backing the cavity-type-will remain essentially the same, ensuring efficient broken efficiency for backing synchronization wear to avoid the partial backing malicious damage to the lining wear rate, extend the backing of the cycle.

The constant cavity design idea, is the backing the cavity shape basic maintenance is invariable in the stave attrition situation, guarantees the highly effective stave efficiency, thus the realization backing synchronization wore, has avoided the backing partial evil intention damage, achieved the

Constant cavity design concept, is abrasion of liner in the broken cases cavity shape has remained virtually unchanged, ensuring high crushing efficiency, thus achieving wear liner synchronization, malicious damage avoided backing local, reach the liner wear rate, extend the cycle of liners.

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