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1986-11-26
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1987-06-01
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1988-06-23
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1987-07-29
Method and apparatus for producing white cement clinker
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1988-03-31
Method of making cement mixes
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1987-09-21
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1988-07-13
Method of producing concrete
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1989-03-30
Method and apparatus for producing clinker
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1989-02-22
Method of making coloured concrete roof tiles
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1987-04-21
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1986-07-01
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1988-04-13
Method of mixing materials and apparatus therefor
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1987-03-23
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1988-11-23
Method and apparatus for manufacture of constructional elements
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1994-06-09
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1988-08-04
Method of and apparatus for manufacture of building elements
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1986-08-27
Method of and apparatus for forming building slab
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1986-03-12
Method of and apparatus for forming building slab
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1986-04-22
Lining tile and method of obtaining lining tiles
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1986-11-04
Method of manufacturing roof tiles
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1988-05-26
Method of obtaining phosphogypsum building materials
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1987-11-25
Roof construction and method of roof construction
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1986-07-29
Method of and set of equipment for making terrazzo tiles
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1985-07-02
Method of obtaining a cement clinker and system therefor
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Apparatus for and method of rectifying building facilities