Concrete-block production method - uses compacting plates with protrusions on front faces
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Tube production method from spiral strip - shaping tool has blocks in opposite pairs with strip which is to be wound into spiral to form tube passing between them
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Device for manufacturing stones.
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Concrete block mfg. method - uses press with controlled vibration movement which has spring loaded stops controlled by cylinder to stop process
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Method for manufacturing stones in a press, and press for manufacturing said stones
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Method and apparatus for manufacturing stones in a mold
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AIR Duct.
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Tube bend section forming method - involves winding flat strip in spiral with beaded-over joint on inside
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Talus coating
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Device for manufacturing a block mat
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Block mat comprising concrete blocks
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Paving stone.
NL8203333A
Talud cladding.
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Method for manufacturing a flexible soil and / or talud protection structure
