dust spray tester: Chamber dimensions correspond to specification Adjustable webbing winding movement. Dust spray tester:1 Doc. ... Function Check the mechanism assembly dustproof by specified dust5 Test Specification KS R4027, JIS D 4604, EC 2000/3, ... Reg. No.16, GB141666 Requirement a) Chamber dimensions correspond to specificationb) Adjustable webbing winding movement.c) Adjustable webbing winding ...