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 1.未上门服务前,定金无条件退回,不扣任何手续  费。                                                                                                                                                                       2.先施工后付款。                                                                                                                                                                                                                                                                                                           3.材料保证正品,假一赔十。                                                                                                                                                                                       4.质保5年