本合同自签署之日生效,甲乙双方各执一份参照.
This contract is effective after both parties making their signatives, each party keeps one copy for reference.
本合同一式两份，双方各执一份，合同自签定之日起生效。
This contract is in duplicate, both sides each hold one copy, the contract shall come into force as of the signing date.
本合同一式两份，甲、乙双方各执一份为凭。
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