There are several factors that can lead to {HEAD ~ the collapse} of {TAIL ~ micro posts}: collapse due to weight, due to adhesion forces between the posts and the base surface, and due to lateral adhesion between the posts 
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There are several factors that can lead to { HEAD ~ the collapse } of { TAIL ~ micro posts } : collapse due to weight , due to adhesion forces between the posts and the base surface , and due to lateral adhesion between the posts
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH