Derniers inventions, produits et services
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2022
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Invention
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Stem seals with triangular rings. A pressure-tight stein cylinder seal and a self-energizing stei... |
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2018
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Invention
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Stem seals with triangular rings. A pressure-tight stem cylinder seal and a self-energizing stem ... |
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2016
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Invention
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Sealing tightness testing device. L=pt/C is used to represent the tightness of the pressure vesse... |
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Invention
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Seal tightness testing device. A seal tightness testing device and pressure-maintenance testing m... |
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2009
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P/S
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Valves of metal other than parts of machines, pipe work of metal, advertisement columns of metal,... |
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P/S
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Props of metal, valves of metal (other than parts of
machines), pipe work of metal, advertisemen... |
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