{HEAD ~ A set} of {TAIL ~ suction heads} can be mounted to the head carrier in any desired arrangement, corresponding to the desired chip arrangement on the circuit board, by having their holders removably engaged in selected ones of the array of mounting holes in the head carrier 
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{ HEAD ~ A set } of { TAIL ~ suction heads } can be mounted to the head carrier in any desired arrangement , corresponding to the desired chip arrangement on the circuit board , by having their holders removably engaged in selected ones of the array of mounting holes in the head carrier
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH