英语翻译预付款到账合同生效后3个月 自报价之日起60天内.设备的最快交货期：预付款到账合同生效后3个月设备报价的有效期：

the fastest delivery date:three months after the contract takes effect once the advanced payment is made？ 是预付款到账合同生效3个月内，还是3 个月之后？预付款到账与合同生效的关系是如何？ terms of vadility for the equipment's quotation:within 60 days since the quotation is offered.

the package size and weigh of the biggest equipment for tansportation 建议回答一下刚才我提的问题，因为这些内容在国际贸易中非常重要，差之毫厘，谬以千里啊。