Door closers : part - 1 : specification for mechanical performance of crank and rack and pinion overhead closers

Door closers : part - 1 : specification for mechanical performance of crank and rack and pinion overhead closers - - London BSI 1984 - 5 p. - BSI 6459 : part - 1 : 1984 .







DBSI 6459 : part - 1 : 1984

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