求翻译：C.卖方已按本合同第19条规定接受了交货延误、机组保证效率和保证功率、水轮机喷嘴漏水量、进水球阀漏水量等的违约赔偿的证明资料（如果有）1份；是什么意思？

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This contract by C . The seller has accepted the provisions of article 19, and crew that delays in delivery efficiency and ensure that power, water turbine nozzles for water polo, water leakage valve leakage of damages for breach of the proof (if any) information;

The C. seller has accepted the delivery delay, the unit according to this contract 19th stipulation had guaranteed the efficiency and the guarantee power, the hydraulic turbine spray nozzle water leakage, enters the water ball valve water leakage and so on the violation compensation proof material (

C. sellers have accepted late delivery as required by this contract in the 19th and crew to ensure efficiency and to ensure power, leakage of turbine nozzle, into water polo valve leakage, compensation for breach of supporting information (if any)-1;

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