Connecting structure of middle beam, lens pile and rimless lens
The utility model discloses a connecting structure of a middle beam, a lens pile and a rimless lens, two holes are formed in the middle beam and the lens pile in a penetrating manner, the hole, close to the edge of the lens, of the hole site is hexagonal and is matched and fixed with a hexagonal tur...
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Format: | Patent |
Sprache: | chi ; eng |
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