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block system
agric., construct.	sistema de distribución de agua "block system"
meas.inst.	sistema de block; sistema de bloqueo
transp.	block-system m; bloqueo m
block signalling system
railw., sec.sys.	sistema de bloqueo

block system : 23 phrases in 7 subjects

Chemistry	1
Communications	6
Drilling	1
Finances	1
Mechanic engineering	1
Packaging	4
Transport	9