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            Machine developed. Being produced by various Building Centres and private entrepreneurs. 
              
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             Developed by 
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             CBRI, Roorkee 
                                           
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             Working specification by BMTPC including manufacturing method 
              
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             CT 05 
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             National standard framed 
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             IS 14241:1994 (Specification)  
            IS 14242:1994 (Code of practice) 
              
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