在木材弦切面可见条纹。平切单板-地板、板。板材-家俱、槛、板。
Stripes sometimes noticeable on flatsawn face. Easily worked. Sliced veneer-flooring and wall. Sawn lumber-furniture, door-sills and flooring.
同一含水率水平下,弦切板的表层应力比径切板的表层应力大。
At the same moisture content level, the stress of surface layer of tangential timber was larger than that of radial timber.
对每个试件,裂纹出现在弦管连接表面,沿弦管与节点板的连接焊缝扩展,并导致性能退化及破坏。
For each specimen, cracks appeared on the chord connecting face, and extended along the weld connecting the plate and chord, which led to the performance degradation and failure of the connection.
That's the harmonic series that's on that, and what the valves do is they shorten and lengthen that vibrating column of air very much like the cello string on the fingerboard.
这就是圆号上的泛音列,活瓣的作用是增长或减短,空气柱的高度,很像大提琴指板上的弦
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