N
a fastening device consisting of one part with a projecting knob that snaps into a hole on another like part, used esp in closures in clothing (使衣服扣上的)扣处设备 (Also called (in Britain and certain other countries) press stud)
[美国英语]
In its construction, engineers adoptedfastenersteel pipeframes to support the semi-spherical domein order to replacereinforcementconcreteandfoundationof the station.