查询词典 alternating current

The current flag has 13 red and white alternating stripes representing the original 13 states and 50 stars each star represents one of the states of the Union on a blue background.

目前美国的国旗上有13条红白相间的横条，代表美国成立之初时的13个州；一块蓝色的底色上有着50颗星，每一颗星代表联盟的一个州。

A capacitance interference model of three-pulse alternating current power supply on signal wire is established.

建立了矿井电器三相交流电对测控信号线的电容性干扰模型，用复数运算法计算了稳态情况下的干扰电压，分析了布线位置对干扰的影响，并将结果推广到尖峰脉冲群下的供电线路，得出的微机测控信号线布线位置与干扰电压的关系对设计测控微机提供了基础。

2 The alternating current electromagnetic yoke shall have a lifting power of at least 10 lb.

5.2 应使用宜兴磁通探伤材料公司生产的黑磁粉 HK-1-400或350。

Each alternating-current electromagnetic yoke shall have a lifting power of at least 10lb(44N).

如果设备已一年或一年以上未使用，则在第一次使用之前必须校验。

Each alternating-current electromagnetic yoke shall have a lifting power of at least 10lb(44N). at the maximum pole spacing.

4.2.1 校验周期：每一带电流表的磁化设备至少应每年校验一次；设备进行过重要电源修理，周期大修或损坏时，必须得到校验。

In recent years, alternating-current generators, or alternators, as they are also called, have come into widespread use.

近几年，交流发电机已得到广泛使用。

In recent years, alternating-current generator s, or alternators, as they are also called, have come into widespread use.

近几年，交流发电机已得到广泛使用。

Pure magnesium was treated by A. C. treatment technique in 0.25mol/L NaZSO4+0.1mol/L NAOH solution. The surface morphology was observed by scanning electron microscopy. The contact angle of the treated surface of pure Mg was measured by the First Ten Angstroms instrument and then its surface free energy can be calculated. The effect of alternating current treatment on the corrosion resistance of the pure magnesium was studied through electrochemical methods in 0.05mol/L NACI+0.01mol/L NAOH solution. The experimental results showed that a uniform and perfect oxide film was formed after A.

采用载波处理方法，用0.25mol/L Na2SO4+0.1mol/L NAOH作为载波处理溶液，对纯镁试样进行载波处理，通过正交试验确定载波处理的最佳工艺参数；用扫描电了显微镜观察载波处理后试样的表面形貌；用First Ten Angstroms仪器测量蒸馏水纯镁的接触角并计算出表面能；用电化学方法研究了在0.05 mol/L NACI+0.01mol/L NAOH溶液中载波处理对纯镁耐蚀性能的影响。

To these epiphanies, we owe the concept of alternating electrical current, the discovery of penicillin, and on a less lofty note, the invention of Post-its, ice-cream cones, and Velcro.

正是由于这种顿悟，人类社会才会有那么多新发明和新发现，大到交流电理论和青霉素，小到报事帖、甜筒冰激凌和维可牢尼龙刺粘扣。

In order to solve this problem,on the basis of analyzing the internal resistance of fuel cell and advantages of EIS method,a practical method of online measurement for fuel cell ohmic resistance ,namely alternating current variable frequency an.

为了解决这个问题，本文在对燃料电池内阻进行分析的基础上，结合电化学阻抗谱测试思想，提出了一种改进的燃料电池欧姆内阻在线测试法——交流变频调幅测量法，并基于高性能数字信号处理器设计了测试系统硬件电路和软件，得到了较好的测量效果。

Foods high in this vitamin include oily fish such as salmon, tuna and, and fish liver oils.

维生素D含量高的食物包括诸如大麻哈鱼、金枪鱼和鲭鱼之类的油鱼以及鱼肝油。

We need you to cosign our public letter demanding that press intimidation cease immediately, and that all charges be dropped.

我们需要您cosign我们的公共信，要求记者立即停止恐吓，并要求所有收费下降。