“bridge board (木楼梯的斜帮,承载踏步)”的概念、定义、翻译、参考文献-科学参考

单词	bridge board (木楼梯的斜帮,承载踏步)
释义	bridge board (木楼梯的斜帮,承载踏步) 梯级搁板
随便看	coupler draft spring support coupler draw bar couple resonator coupler guard arm coupler head coupler horn coupler knuckle coupler knuckle lock coupler knuckle pin coupler knuckle thrower coupler lock coupler loss couple roof coupler pivot pin coupler plug coupler pocket coupler seat coupler shank coupler socket coupler tail coupler yoke coupler yoke key couples couplet coupling

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