Antifalse backward flow preventing composite lid
The utility model relates to an anti-counterfeiting and backward flow preventing composite lid, which is composed of an inner cap 6 and an outlay aluminium cap 2. The utility model is characterized in that the built-in inner cap 6 is composed of an inner plug 3, a glass ball 4 arranged in the inner...
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Format: | Patent |
Sprache: | eng |
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