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详细介绍
地弹簧，进口地弹簧，DORMA多玛
DORMA 多玛BTS80F产品说明
Floor springs designed especially for fire and smoke doors.
Wide range of functions,quality assured.
CERTIFIRE approved for use on certain fire doors:See
certificate 28（BTS 80 F and EMB）.Complies with
requirements of HTM59（DOH）.PSA approved（MOB H3 030.
适用于防火门和防烟门
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