The lateral drive moves the elevation drive unit or the like toward {HEAD ~ the side} of the travel rail, the θ drive rotates the elevation drive unit in a horizontal plane, and the elevation drive unit elevates/lowers {TAIL ~ the elevation frame} where the article is chucked and released freely 
The lateral drive moves the elevation drive unit or the like toward { HEAD ~ the side } of the travel rail , the θ drive rotates the elevation drive unit in a horizontal plane , and the elevation drive unit elevates / lowers { TAIL ~ the elevation frame } where the article is chucked and released freely
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