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1.A hollow shaft that rotates on a solid shaft when gears are engaged.
套管轴齿轮啮合时,在一固定机轴上旋转的中空收藏指正
2.The Investigation on Gating System of the Hollow Shaft Cam in the Expendable Foam Pattern Casting
气化模铸造空心凸轮轴浇注系统的实验研究收藏指正
3.One of the light, flat growths forming the plumage of birds, consisting of numerous slender, closely arranged parallel barbs forming a vane on either side of a horny, tapering, partly hollow shaft.
羽毛构成鸟类羽毛的轻且平的一种生长物,由大量细长的、紧密并列的钩在一个角状的、中空的锥形羽轴两边所形成的羽片收藏指正
4.The hollow stemlike main shaft of a feather.
翎管羽毛的中空的茎状羽干收藏指正
5.A small opening or depression similar to a navel, as the hollow at the base of the shell of some gastropod mollusks, one of the openings in the shaft of a feather, or the hilum of a seed.
脐和肚脐相似的小开口或凹陷,如某些腹足纲软体动物壳的底部的洞,羽毛管的开口中的一个,或种子的种脐收藏指正
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