The invention relates to a mechanical zoom lens device which comprises a first cylinder (103) provided with a zoom curve groove (117) and a compensating curve groove (116), a second cylinder (104) provided with a straight line groove (115), a first circular ring (105) provided with a first keyhole (.....
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The invention relates to the technical field of wireless communication and discloses a double radio frequency scheduling method for quick switching. The method comprises: calculating and collecting measurement data of a plurality intelligent triggers according to metric values of different layers of.....
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The utility model discloses a combined LED lamp holder, which comprises a connecting seat connected with a street lamp fastener, a main bracket connected with the connecting seat and a plurality of lamp components, wherein the lamp components comprise a radiation bracket and an LED component consist.....
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