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DE3224539A1
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Relief or safety valve
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Mobile storage vessel fitting - has non-return valve lifted off seat by tube supported on stop valve
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Two duct valve with magnet - which with corresponding armature holds poppet valve in position
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BUTTERFLY VALVE
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Welding plastic grating - from longitudinal and transverse strips
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Longitudinal and transverse profiling - of plastics extrusion, producing large changes in section
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