If it is necessary for CAR , you need to resend an bathch wafer with "PN" to "SN".
这里的需要应该考虑使用require
You may have to resend a new batch of "PN" wafer to SN if the CAR demand.
to satisfy CAR's requirement.
供参考。
You should resend a number of wafers of “PN” type to SN if it’s necessary for CAR.
You need resend a batch of wafer with “PN” type to SN if it’s necessary for CAR.
If it's what CAR needs, you should resend a batch of "PN" type of wafer to SN.
把前面一个需要改必需
等等