10%定金合同后1周，20%发货前一周内，40%收到货物后1周，其余的30%安装调试验收后30天。
我的翻译：10% deposit dues in 1 week after the contract, 20% of total payment dues the week before delivery, 40% of the total payment dues 1 week after the (goods/machine/equipment) are received, and the remaining 30% will due in 30 days after the installation.
有什么不妥，请指正。谢谢！