Non empty and proper subset是什么意思

网络释义

用法例句

The paper presents a measurement method of radiation indirect action of the nonvacuum pulse electron beam.

本文提出了一种检测非真空电子束辐射的间接作用的一种方法。

The paper presents a measurement method of radiation indirect action of the nonvacuum pulse electron beam.

本文提出了一种检测非真空电子束辐射的间接作用的一种方法。

Electron beam welding of dissimilar high temperature titanium alloy Ti55 and Ti60

高温钛合金Ti55/Ti60真空电子束焊接

Precision Shunt Resistor with its Techniques of Electron-beam Welding

精密分流电阻器及真空电子束焊接工艺

a vacuum tube in which a hot cathode emits a beam of electrons that pass through a high voltage anode and are focused or deflected before hitting a phosphorescent screen.

阴极射出一束电子通过高压正极的真空管。

Design of NC Motion System of Large Vacuum EBW Machine

大型真空电子束焊机数控运动系统的设计

Research status analysis of electron beam welding for joining of dissimilar materials

异种材料真空电子束焊接研究现状分析

A full automatic UHV e-beam evaporation control system for thin film growth

一种全自动超高真空电子束蒸发薄膜生长系统

Numerical simulation on temperature field of electron beam welding of AZ61 magnesium alloy

AZ61镁合金真空电子束焊接温度场数值模拟

A Research on Focus Properties of Annular Electron Beam in Plasmas

等离子体对空心电子束聚束特性研究

Hollow electronic beam welding can solve the difficult problems of the aluminium alloy' s welding.

真空电子束焊接独特的优点可以解决铝合金的焊接难题。

Cathode-ray tube (CRT): Vacuum tube that produces images when its phosphorescent surface is struck by electron Beams.

阴极射线管:一种真空管,当电子束打在其磷光表面会产生影像。

a vacuum tube containing a metal target onto which a beam of electrons is directed at high energy for the generation of X rays.

一束电子被高能量定向以产生x光的包含有金属对象的真空管。

Study of Vacuum Electron Beam Welding Test for Stationary Blade Carrier of Gas Turbine Compressor;

燃气轮机压气机静叶环真空电子束焊接工艺试验研究

Numerical Simulation and Control of Titanium Alloy Welding Deformation by Vacuum Electron Beam Welding

钛合金筒件真空电子束焊接变形数值模拟及控制

The Study of Electron Beam Welding Process for AZ61 Magnesium Alloy and Its Numerical Simulation of Temperature Field

AZ61镁合金真空电子束焊接工艺及其温度场数值模拟研究

Research on the Vacuum Electron Beam Welding Process for HP and IP Diaphragm of Ultra-Supercritical Steam Turbine

超超临界机组高中压隔板真空电子束焊接工艺研究

Microstructure and Wear Resistance of(Cr,Fe)_7C_3/γ-Fe Alloy Cladding Layer Synthetized by VEB

真空电子束熔覆(Cr,Fe)_7C_3/γ-Fe合金层的显微组织和耐磨性

Performance Research on Vacuum Destressing Annealing of TC4 Electron Beam Welded Joint

TC4钛合金电子束焊接接头的真空去应力退火工艺研究