单词	db rn
释义	db rn 电杂音分贝
随便看	trussed steel joist trussed steel through arch bridge trussed stringer trussed supporting structure trussed system truss bridge truss bridgelattice girder bridge truss bridges truss-buttress dam truss cable truss-cable analysis truss-cable composite steel bridge truss-cable nets truss cables truss camber truss cell truss chord truss column truss-column Truss combination truss configuration truss core truss-cored metal sandwich plate truss-core panel truss core sandwich