General

General

B/L

Abbr. for bill of lading

General

B-labeled door

A door carrying a certification from the Underwriters Laboratories, Inc. that it meets the requirements for a class-B door.

General

base screed

A metal screed having expanded or short perforated flanges; acts as a dividing strip between plaster and cement; provides a

General

base sheet

Saturated and/or coated felt sheeting which is laid as the first ply in a built-up roofing membrane.

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