. Mr. David Chen
. Acid & base treatment activated carbon media for filter and respirator
. Painting booth filter & pre-filter
. Cabin air filter media
. Air conditioner filter for buildings and clean room
. Activated carbon filter media for cabin
. Filter ? HVAC system, clean room filter, vacuum cleaner, furnace filter, roommate air cleaner, automotive, water purify ?etc.
. Vacuum cleaner filter media
. Multi-pak filter media
. Cardboard filter media
