The surrounding bodies and the supporting body are connected by {HEAD ~ a plurality} of {TAIL ~ welding spots}, and the edges are properly sealed 
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The surrounding bodies and the supporting body are connected by { HEAD ~ a plurality } of { TAIL ~ welding spots } , and the edges are properly sealed
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH