... Security mechanism in case chain is broken, (state patent) 2000kg Fireproof Door Motor Verified Information This information is Verified by Bureau Veritas ... Production Line Capacity Actual Units Produced(Previous Year) Sectional Door Opener 200,000 sets per year 120,000 sets Export ... ECMG ZHA-1006-10441-EMC/MD(60204)/(14121)/(200642EC) Sectional door operator, GKH1-100/22, GKH1-50/24, GKH2-150/17, ...