Blower-coil unit In an HVAC procedure, a blower that strikes an airstream throughout cooling coils, heating coils, and during an air filter out. blow gap 1. comparable as gasoline pocket. 2. comparable as computer virus gap. blowing 1. See popping. 2. The upward move of soil fabric on the base of an excavation or cofferdam because of groundwater strain. blowlamp British time period for blowtorch. board-and-batten building blown asphalt Asphalt that's handled by way of blue print a duplicate of a drawing by way of blowing air via it at increased temperature to provide it features wanted for convinced detailed makes use of reminiscent of roofing, pipe coating, undersealing portland cement concrete pavements, membrane envelopes, and hydraulic functions. blown joint, blow joint A plumbing joint in a lead pipe, shaped with using a blowtorch. blown oil A fatty oil that has been oxidized through blowing air via it whereas it's sizzling; occasionally combined with mineral oil to be used as a lubricant; utilized in paints and varnishes simply because oxidation raises its drying strength and viscosity. blow-off On a boiler, an outlet to allow the release of accrued deposits from water. technique of a touch printing method on lightsensitive paper, generating a unfavourable snapshot along with white strains on a blue heritage; esp. refers to such reproductions of architectural drawings or operating drawings used on development websites. blue stain a gloomy stain within the sapwood of a few species of bushes, often brought on by a fungus; it doesn't weaken the wooden; often known as sap stain. bluestone a difficult, fine-grained, as a rule feldspathic and micaceous sandstone or siltstone of darkish greenish to bluish grey colour that splits without difficulty alongside bedding planes to shape skinny slabs; widespread to pave surfaces for pedestrian site visitors. quite a few flagstone. blue best A stake that's pushed into the floor, the pinnacle of which exhibits the grade point. bluing The addition of a small volume of unpolluted blue colorant to a white paint to advertise the visible belief of whiteness. blunt arch An arch emerging to a mild aspect, struck from facilities in the arch. a tank which gets discharge from a boiler blow-off blowout related as blowing, 2. blowtorch, Brit. blowlamp A small torch which generates a high-intensity flame; used for heating soldering irons, burning off paint, and so forth. blow-up Localized buckling or shattering of inflexible pavement brought on by over the top longitudinal strain. BLR On drawings, abbr. for boiler. blub A small gap in a mould or plaster forged, shaped via trapped air. blue asbestos comparable as riebeckite asbestos. blue brick, sewer brick, Staffordshire blue A brick of excessive energy whose blue colour effects from firing in a kiln in a flame of low oxygen content material. blued stated of a metal nail floor that has been heated in order that its floor takes on an oxidized bluish hue. blue lias lime (Brit. ) A hydraulic lime bought by way of burning blue lias limestone. while combined with water, it has a suite which isn't attribute of standard limes. blue steel a troublesome rock, bluish in colour, that is beaten and utilized in macadam.