Double flat 重降号
Double Disc Flat Gate Valves 双闸板平板闸阀
double-flat E 重降号
double-flat ໕ 重降号
double-flat U 重降号
double flat foolscap 纸张尺寸
double flat foot spin 双脚平刃旋转
Double flat rate pricing 双重费率定价
double-head flat scraper 双头平刮刀
以上来源于: WordNet
N an accidental that lowers the pitch of the following note two semitones 重降号; 表示要降两个半音的记号 (Usual symbol ♭♭)
N a note affected by this accidental 受重降号影响的音调
ADJ denoting a note of a given letter name lowered in pitch by two semitones 音调降两个半音的
The Boston-based company had sales growth in the double digits for the past few years, when revenue fell flat last fall.
这家设在波士顿的公司在过去几年里的销售收入一直以两位数字的速度增长，不过在去年秋天，该公司收入却停滞不前了。
Double layer flat diagonal square pyramid grids has the advantages of being simple in formation, rational in member stressing and fairly economic of steel cost among square pyramid grids system.
双层平板型斜放四角锥网架节点构造简单，受力合理，用钢量是四角锥体系网架中最小的一种形式，也是国内工程中应用较多的一种。
Double reversed star shape, interphase reactor, flat wave output circuit, stable welding current.
双反星型，平衡电抗器及平波输出电路，焊接电流稳定。
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