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FR2333701A1
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Small boat propulsion element fitted to rudder - is in form of flexible fin mounted on rudder blade
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ES434203A1
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Improvements introduced in heating generators. (Machine-translation by Google Translate, not legally binding)
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DE2503217A1
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Continuous flow gas fired hot water heater - thermostatic control with thermal inertia gives hysteresis effect
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US3582247A
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Apparatus for detecting traces of heavy combustible gases and heating systems incorporating such apparatus
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GB727319A
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Improvements in or relating to mould removal in foundry moulding machines
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GB590049A
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Improvements in or relating to joining and registering devices for moulding boxes
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CA886909A
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Arrangement for checking the condition of the air enclosed in small-sized premises such as caravans and ventilating same
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