求翻译：所有需要用户为安装和调试工作做准备的要求，卖方应提前8周，以书面形式向用户提出，否则卖方应承担所有引起安装和调试工作被推延的责任。是什么意思？

All users need to work to prepare for installation and commissioning requirements, the seller should be 8 weeks, in writing to the user, otherwise the seller shall bear all caused by delay in the installation and commissioning responsibilities.

All require the user to install and debug preparations must be made in advance for 8 weeks, and the seller in writing, submitted to the user, otherwise the seller has to bear all cause installation and debugging work responsibilities have been postponed.

All need user prepares for the installment and the debugging work the request, the seller should ahead of time 8 weeks, proposed by the written form to the user, otherwise the seller should undertake all causes the installment and the debugging work the responsibility which extends.

All need to prepare users for the installation and commissioning work requirements, the seller should be 8 weeks in advance, in writing to the customer, otherwise the seller should bear the responsibility of all caused by installation and commissioning work was postponed.

All need user prepares for the installment and the debugging work the request, the seller should ahead of time 8 weeks, proposed by the written form to the user, otherwise the seller should undertake all causes the installment and the debugging work the responsibility which extends.