求翻译：乙方应于合同签定之日起天内安装完毕（不包含节假日），甲方有无偿提供220V或380V电源及水泥、水源、沙石至安装现场的义务。是什么意思？

Party B shall contract signed within days from installation (not including holidays), Party A has provided free of charge 220V or 380V power and cement, water, sand and gravel to the installation site of the obligation.

Party B shall be the date of signature contract installed within days (does not include holidays, Party A has V gratis 220 or 380 V power and cement, water, sand and installation site.

The second party should install date of day in the contract evaluation finished (does not contain holiday), the party of the first part has free provides 220V or the 380V power source and the cement, the water source, the grit to installs the scene the duty.

Party b shall contract signed within days of the date of installation (excluding holidays), party a has provided free 220V or 380V power and cement, water, sand to the installation site of the obligation.

Party b shall contract signed within days of the date of installation (excluding holidays), party a has provided free 220V or 380V power and cement, water, sand to the installation site of the obligation.