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Classification Resources
 

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X Ray ......................................  378
    Absorption .............................  378 / 51
    Circuits ...............................  378 / 91
    Computerized tomography ................  378 / 4
    Contrast compositions (in vivo) ........  424 / 9.4+
    Diffraction ............................  378 / 70
    Equipment ..............................  D24 / 158+
    Exposure process .......................  430 / 967*
    Film ...................................  430 / 966*
        With cassette ......................  378 / 182
    Filters ................................  378 / 156
    Fluorescence ...........................  378 / 44
    Fluoroscope ............................  378 / 190
    Lithography ............................  378 / 34
    Photographic ...........................  378 / 167
    Scattering .............................  378 / 86
    Screen  
        Bucky grid .........................  378 / 154
        Fluorescent or phosphorescent ......  250 / 483.1
        Tube with secondary ray ............  378 / 140
    Shield .................................  252 / 478
    Shields and shielding ..................  250 / 515.1
        Compositions .......................  252 / 478
    Shoe fitting machine ...................  378 / 192
    Therapy ................................  378 / 65
    Timer ..................................  378 / 96
    Treating ...............................  378 / 64
    Tube ...................................  378 / 121
    Tubes ..................................  378 / 121
    Used in reaction to prepare ............  204 / 157.15+
    Inorganic or organic material ..........  204 / 157.15+
    Used in reaction to prepare or .........  522 / 1+
    Treat synthetic resin or ...............  522 / 1+
        Manufacture ........................  445 / 28
X-Type Package .............................  206 / 809*
Xanthate  
    Cellulose fiber treatment ..............  8 / 122
    Esters .................................  558 / 245+
        Cellulose ..........................  536 / 60+
    Froth flotation ........................  209 / 166+
        Compositions .......................  252 / 61
Xanthenes ..................................  549 / 388+
Xanthines ..................................  544 / 267+
Xanthogenation (See Xanthate)  
Xanthones ..................................  446 / 372
Xanthosine (Xanthine Riboside) .............  536 / 27.8
Xenol ......................................  568 / 747
Xenon ......................................  423 / 262
Xerography(See Photography, Electric) .....  430 / 31+
    Dispensing digest ......................  222 / DIG 1
    Printing data in digital computers .....  430 / 31+
Xeroradiography ............................  378 / 28
Xylene  
    Alkylation to produce ..................  585 / 446+
    Dealkylation ...........................  585 / 483+
Xylenol ....................................  568 / 716+
Xylidine ...................................  564 / 305+
Xylophone ..................................  84 / 404
    Design .................................  D17 / 23
    Toy (design) ...........................  D21 / 410