Pass box as an auxiliary device of a clean room, mainly used to deliver small objects between clean area and clean area , unclean area and clean area . In order to reduce doors opening times of clean room, to mixmum reduce the pollution of the clean area.

Clean room (simple clean room) (CLEAN BOOTH) is the most convenient to establish a simple clean room, clean room with a variety of clean grade and space collocation can be used according to the needs of design, so the simple use of elastic installation as the main characteristic of shift easily and short construction period and at the same time