查询词典 signal noise ratio

ratio flow control：比例流量控制

rating nut调整螺母 | ratio flow control比例流量控制 | rationale理论、理论基础

Cash flow from operations：经营现金流

73. 销售利润率Profit to sales ratio 1 2 3 4 5 | 74. 经营现金流Cash flow from operations 1 2 3 4 5 | 75. 投资回报率Return on investment 1 2 3 4 5

rating flume：计量槽

rated load 额定载荷 | rating flume 计量槽 | ratio 比

flyback pulse：回描脉冲,扫描逆程脉冲

flyback power supply 回描电源,行逆程高压电源 | flyback pulse 回描脉冲,扫描逆程脉冲 | flyback ratio 回描率,回扫率

Flyweight：提前器飞锤

海拔控制器 altitude control | 提前器飞锤 flyweight | 喷孔长径比 ratio of nozzle hole length nozzle diameter

focal plane：焦面

focal length ratio 焦距比 | focal plane 焦面 | focus of earthquake 震源

focal radius：焦点半径

focal proliferation 局灶性增殖 | focal radius 焦点半径 | focal ratio 焦比

nominal focal surface：名义焦面

nominal focal ratio 标称焦距比 | nominal focal surface 名义焦面 | nominal fracture strain 标称破裂应变

clearance between focal point and (plate) surface：离焦量

焦斑直径focussed diameter of the beam | 离焦量clearance between focal point and (plate) surface | 焊缝深宽比weld seam depth-to-width ratio

focusing screen：对焦屏

一架理想的天文摄影用的单镜反光机,其对焦屏(Focusing screen)最好能够更换. 普通单镜反光机所配备的微梭镜(Micro-prism)或裂像(Split-image)对焦屏在放大摄影一般运用的有效光圈范围(Effective focal ratio,通常由直接焦点的 / 6左右至高倍放大时的 / 100以上),

dog tag style：狗标记作风

Identification necklace鉴定项链 | dog tag style狗标记作风 | 20 inch length 20英寸的长度

final examination：活動/事件教務期末考試

1216.活動/事件教務停課Class recess | 1217.活動/事件教務期末考試Final examination | 1218.活動/事件教務補考Make-up examination