How many zones are there in a horizontal laminar flow table? What is the purpose of each zone?

. Horizontal laminar flow clean bench: its work area airflow pattern for the horizontal laminar flow.

2. Vertical laminar flow clean bench: the work area airflow pattern

for vertical laminar flow. Vertical laminar flow clean bench according to the operation of the operation area of the different ways, can be divided into single-sided operation of the vertical laminar flow clean bench and double-sided operation of the vertical laminar flow clean bench