查询词典 F.

Blow down float chamber at least once a week by opening valve "F" and letting water run for a few minutes.

通过打开阀门"F"一周至少一次来排放浮腔，让水流动几分钟。

Through understanding the distribution of DO and substrate within a biological floc, the effect of DO and F/M on sludge production was analyzed from theoretical aspect.

通过了解DO和基质在菌胶团内部的分布情况，从理论上分析了DO和F／M对污泥产率的影响。

A sixth crashed itself during an air-to-air engage- ment against an F-15E strike package in the process, managing to shoot down its own wingman, a MiG-23 "Flogger," and the only confirmed "kill" by a MiG-29 to date.

"第六个在空中坠毁自己空参与，对精神疾病的F - 15E战斗机包（在这个过程中，管理击落自己的僚机，一米格-23"鞭击者"，而只是证实"杀的一米格-29的日期。

Onica F Flores , a city resident who does not own a car, backs the new law.

F 是一名没有汽车的市民支持这项新的法律。

Research on the Depth Measurement of Micro Channels of Micro Fluidic Chips Based on D.F.D.

论文标题：基于D.F.D。的微流控芯片流道深度检测研究

CQB-F series fluoric plastic magnetism-driven pump uses magnetic coupling drive without dynamic seal, thus to effectively avoid the phenomena of losing, emitting and leaking borne by shaft seal of common shaft drive type centrifugal pumps.

概述 CQB-F系列氟塑料磁力驱动泵，采用磁力耦合传动，不存在动密封点，因此彻底杜绝了一般轴行动式离心泵轴封处跑、冒、滴、漏的现象。

The FSQ employs 4 lenses, including 2 fluorite elements, to create a 4 f/5 masterpiece.

FSQ采用4片透镜，包括2片萤石物镜，能实现4寸f/5的优异像质。

Regular porosity in about 38 nanometer size was observed using atomic force microscopy. Excitation and Emission spectrum were obtained by using F-4500 fluorometer.

用F-4500型荧光分光光度计测量其三维荧光谱，与未经氧化的铝片作对比，发现前者的激发谱在280 nm~340 nm有一个较宽的谱带，并且在253.8 nm附近有一个肩峰，发射谱有一个以417.4 nm为峰值的较宽谱带，而后者却无任何明显的发射峰和激发峰。

The focal length f is the distance of the focus of an optical system from the assigned main point.

焦距f 是光学系统主点到焦点的距离。

Taking for the f 6 of ground fissures in Xi'an city, this *** imitated disaster prevention of the three-level buildings which were crossing the ground fissures and the width of the influencing zone of ground fissure hazards. Based on the finite element analysis, it calculated the safety distance of hanging wall and footwall.

以西安市f 6地裂缝为例，对跨地裂缝的三级建筑物防灾、地裂缝灾难影响带宽度进行了数值模拟；提出了上下盘建筑物的安全间隔。

Shop assistant: Please check at the door.

店员：请您到门口柜台交费。

In the end, transportation of PAHs in the environmental matrix was preliminarily investigated and discussed according to PAHs data of soils and sediments from a certain region in Shanghai. The result indicated that there are two or more pathways on PAHs transportation in the environmental matrix.

最后，对上海特定地区内PAHs在环境介质中的迁移径途进行了分析讨论，结果表明上海市土壤和沉积物等环境介质中PAHs的迁移存在多种途径。