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Window sash-The operating or movable part of a window;the sash is made of window panes and their <br /> border. <br /> Window sill-See Interior window sill. <br /> Window trough-For a typical double-hung window,the portion of the exterior window sill between the <br /> exterior window sill between the interior window sill(or stool)and the frame of the storm window. If <br /> there is no storm window,the window trough is the area that receives both the upper and lower window <br /> troughs when they are both lowered. Sometimes inaccurately called the window"well." See also <br /> Window well. <br /> Window well-The space that provides exterior access and/or light to a window that is below grade,i.e., <br /> below the level of the surrounding earth or pavement. <br /> XRF analyzer-An instrument that determines lead concentration in milligrams per square centimeter <br /> (mg/cm2)using the principle of x-ray fluorescence(XRF). For lead-based paint inspections,the term <br /> XRF analyzer only refers to portable instruments manufactured to analyze paint,and does not refer to <br /> laboratory-grade units or portable instruments designed to analyze soil. <br /> Building component terms from www.HomeBuildingManual.com;other terms from the Housing and Urban <br /> Development(HUD)Guidelines Chapter 7(revised 1997). <br /> 49930 N Santiam Hwy SE,Idanha,OR 97350 - Page 143 <br />