Device (not included in other classes), engineered in particular in spherical, spiral or perforated shape, made of non-precious metal or an alloy of the above, employed in tanks for preventing explosions

'alloy':24 'class':6 'devic':1 'employ':28 'engin':7 'explos':33 'includ':3 'made':16 'metal':21 'non':19 'non-preci':18 'particular':9 'perfor':14 'precious':20 'prevent':32 'shape':15 'spheric':11 'spiral':12 'tank':30

Device (not included in other classes), engineered in particular in spherical, spiral or perforated shape, made of plastic, employed in tanks for preventing explosions included in this class

'class':6,28 'devic':1 'employ':19 'engin':7 'explos':24 'includ':3,25 'made':16 'particular':9 'perfor':14 'plastic':18 'prevent':23 'shape':15 'spheric':11 'spiral':12 'tank':21

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