The standard manufacturer will print out the batch number (a batch of products) or serial number (a single product), and use the secondary number to indicate the production situation. If there is a product problem in the future, you can show this figure to the customer, so that you (the manufacturer) can easily find and analyze the reasons.
Extended data:
1, the batch number is produced to track the responsibility of this batch of products afterwards and avoid confusion, so each batch of products has a corresponding batch number. It is a set of numbers or letters plus numbers, which is used to identify the "batch". Generally, it consists of two digits of production time: year, month and day, but there are exceptions. The validity period is calculated from the production date (based on the production batch number), so according to the batch number, you can know whether the purchased product is within the validity period.
2.lot, also an English word, means draw lots, lots. Example:
(1) there
be
a
many
about
human
exist
this
railway
There are many people in the railway station.
(2) this
many
about
shoe
sell
very
All right. These shoes sell well.
(3) They
draw
many
arrive
decision
who
should
They drew lots to decide who would start first.
References:
Sogou encyclopedia _ production batch number Sogou encyclopedia _lot