procedure of trial production of new products

例句：

1. 1. The procedure for testing thenew product is very complex.
   测试新产品的程序非常复杂。
2. 2. The company has a standard procedurefor handling customer complaints.
   该公司有处理客户投诉的标准程序。
3. 3. The engineer followed the manufacturer's recommended procedure for installing the newsystem.
   工程师按照制造商推荐的安装新系统的程序进行操作。