Major change, including material and process change, get customer approval before implementation.

重大更改，包括材料和工艺，在执行前是否通知客户，取得批准。

youdao

Major change, including material and process change, get customer approval before implementation.

重大更改，包括材料和工艺，在执行前是否通知客户，取得批准。

youdao