WP402A mai watsa matsa lamba yana zaɓar shigo da, madaidaicin madaidaicin abubuwan haɗin gwiwa tare da fim ɗin hana lalata.Sashin yana haɗa fasahar haɗin kai mai ƙarfi tare da keɓance fasahar diaphragm, kuma ƙirar samfurin yana ba shi damar yin aiki a cikin yanayi mara kyau kuma har yanzu yana kula da kyakkyawan aikin aiki.Juriya na wannan samfurin don diyya zafin jiki da aka yi a kan gauraye yumbu substrate, da kuma m aka gyara samar da karamin zafin jiki kuskure na 0.25% FS (mafi girma) a cikin ramuwa zazzabi kewayon (-20 ~ 85 ℃).Wannan na'urar watsa matsi yana da ƙarfi anti-jamming kuma ya dace da aikace-aikacen watsawa mai nisa.