an ell with the outlet in the same place as run and on the outside of the large radii curve. Also referred to as heel outlet elbow. Advertisements
an instrument for measuring pressure of the atmosphere. Usually expressed in “inches of mercury”.
mineral wool made by blowing a jet of steam through molten rock, as limestone or siliceous rock, or through slag. Used chiefly for heat and sound insulation.
a drill for stone, or masonry, that has a star-shaped point and that operates by being struck with a hammer and rotated.
usually a sunken or raised section of a surface in an appliance or machine, in a wall, floor or ceiling of a building, made to be opened so that the interior may be reached for service. Also called access door.
a non-metallic, multivalent element of the nitrogen family that occurs especially as phosphates. Sometimes used in steel as it enhances the strength and makes it better able to resist abrasion.
phenomenon occurring when matter passes from a gaseous state to a solid state without liquefying or passing directly from a solid to a vapor state.