Comprehensive boiler and machinery (BM) coverage is coverage that applies to all insurable objects...
Blanket group boiler and machinery (BM) coverage applies to all equipment of a certain type.
It contrasts with coverage applying only to individually described objects and with coverage applicable to all insurable objects (referred to as "comprehensive boiler and machinery coverage").
Comprehensive boiler and machinery (BM) coverage is coverage that applies to all insurable objects...