产品等从生产线上下来to come off an assembly line

• 展会上不少车都是今年3、4月份刚刚下线或上市的。

  Many of the cars at the exhibition have just come off the assembly line or were launched in March or April this year.

• 首批风电机组在内蒙古开鲁县下线。

  The first batch of wind turbines are coming off the assembly line in Kailu county, Inner Mongolia.