1.
The materials of semicircle seamless steel tube can fall into carbon steel (20#) and stainless steel (321).
半圆无缝管材质有碳钢（20#钢）和不锈钢（321钢）。
2.
Laser Remelting on Surfaces of 20 Steel and 5CrNiMo Steel after Boronization;
20钢和5CrNiMo钢表面渗硼后的激光重熔
3.
Constructed with20*20 square steel tube. coated with epoxy resin powder on the surface.
· 20*20 方钢结构，表面经环氧树脂静电粉末喷涂。
4.
The Research of Carbonitriding with Rare Earth for the 20 Steel Ring in Poisonless Salt Liquid;
20钢制纺织钢领无毒液体C-N-Re共渗研究
5.
Research of Welding Speciality and Mechanism of New-style Wearing Resistant Cast Steel and 20 Steel;
新型抗磨铸钢与20钢的焊接特性及机理研究
6.
Research of Improving the Guality of the Fine Guality Carbon Structural 20# Steel Plate.;
提高优质碳素结构钢(20#)钢板质量的研究
7.
Sales (Profits / Steel output) plunged by 20 %.
销售额(利润／钢铁)产量猛跌了20％。
8.
STUDY ON THE PROPERTIES OF STRUCTURAL TUBE PRODUCED BY USING CC 20 STEEL ROUND BILLET
20钢连铸圆坯生产结构管的性能研究
9.
Practice of 20~# Tube Blank Steel Produced by EAF with Compact Process
电炉短流程生产20~#管坯钢工艺实践
10.
Pass design of medium section mill for 20/12.5 unequal angle steel
中型轧机生产20/12.5号角钢的孔型设计
11.
Optimum Design Roll Passes of Rolling No.20 Angle Iron Through Medium Section Mill;
中型轧机轧制20号角钢孔型优化设计
12.
Research and Development of Mould Fluxes in 20 Steel Bloom Continuous Casting;
20钢大方坯连铸保护渣的开发与研究
13.
Musical analysis on the No.20 Piano Concerto by Mozart;
莫扎特第20钢琴协奏曲的音乐学分析
14.
On the Knock-Timbre in Piano Works in 20~(th) Century;
20世纪钢琴作品中的敲击性音色初探
15.
Progress in technology of hot strip continuous rolling during the last twenty years in China;
我国热连轧带钢生产技术进步20年
16.
Study of Process and Performance after Combination Surface Treatment on 20 steel
20钢复合表面处理技术的研究(英文)
17.
Technic and Performance of Steel 20 Treated by Low-temperature Chromizing in Salt-bath
20钢低温盐浴渗铬工艺及性能研究
18.
Welding of the big diameter X80 pipe in low temperature environment of -20℃
-20℃低温环境下大口径X80钢管的焊接