NC2 系列交流接触器 ( 以下简称接触器 )，主要用于交流 50Hz 或 60Hz，额定工作电压至 690V，额定工作电流至 800A 的电路中，供远距离接通和分断电路之用，并可与适当的热过载继电器 组成电磁起动器，以保护可能发生操作过负荷的电路。

Highway Engineering Concepts (HEC) Started in 1985 as a cooperative venture with the North Carolina Department of Transportation (NCDOT), the HEC Course reviews and reinforces Fundamental Engineering Principles (FEP) course content through a project-based curriculum that applies engineering principles to real- world transportation engineering ...

An important feature of HEC-RAS is the ability to import HEC-2 data. This feature makes it easy for a user to import existing HEC-2 data sets and start using HEC-RAS immediately. HEC-2 is...

TESDA NC2 or (NCII) courses cover a wide range of industries such as agriculture, automotive, construction, electronics, healthcare, hospitality, information technology, and many others. These courses are developed by experts in their respective fields to ensure that the curriculum is aligned with industry standards.

2020年12月18日 · Survivable and enduring nuclear command and control (NC2) capabilities disseminate warning information and nuclear control orders and add significant resilience to the NC3 system of systems. NC2 is the exercise of authority and direction by the President, as Commander-in-Chief of the US Armed Forces, through established national command

*同一壳架等级的接触器指外形尺寸和内部结构相同，仅部分尺寸有差异，但额定工作电流不同的接触器；例如nc2-115和nc2-150为同一壳架等级(115~150)的接触器。

NC2 is the exercise of authority and direction by the President to command and control United States (U.S.) military nuclear weapon operations. NC2 consists of five mission

2024年10月19日 · HEC-HMS (The Hydrologic Engineering Center’s-Hydrologic Modelimng System)，美国陆军工程兵团水文工程中心开发的流域性洪水模拟系统，是一个具有物理概念的半 分布式 次降雨径流模型。 根据降雨径流的形成过程，将其划分为净雨过程、直接径流过程、基流和河道汇流4个计算部分，主要用于树状流域径流过程的模拟。 根据 DEM，将流域划分为若干子流域，计算每一子流域产流量，经坡面汇流和河道汇流，最后演算至流域出口断面。 HEC-HMS …

2022年12月14日 · 美国国防部《核事务手册》（2020年）指出：nc2是由美国总统作为首席执行人和国家元首，通过既定指挥系统对核武器行动行使权力和指导。 NC2由一个抗毁的通信和预警系统网络提供支持，确保美国总统与所有具有核职能的部队之间的专用连接。

2007年6月12日 · Negative cofactor 2 (NC2) forms a stable complex with TATA-binding protein (TBP) on promoters in vitro. Its association with TBP prevents the binding of TFIIB and leads to inhibition of preinitiation complex formation.