1.
Research and practice of Steel 20 produced by thin slab casting and rolling process
薄板坯连铸连轧流程生产20号钢的开发与实践
2.
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
3.
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
4.
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）。
5.
He will be performing on the horn (at the piano).
他将吹号(弹钢琴)。
6.
She phoned me on the 20th.
她是20号给我打的电话。”
7.
A Study of the "Unequal Treaties"as Political Symbols in the 1920s;
20世纪20年代“不平等条约”口号之检讨
8.
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
9.
OK. Our seats are in Row G, number 20 and 22.
好的，我们的座位是g排20号和22号，
10.
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。
11.
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
12.
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
13.
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
14.
Steel products standard designatio
GB/T15575-1995钢产品标记代号
15.
Designation of SUS Steel Special Use Stainless
不锈钢片材常用代号
16.
special improved patented steel wire
特号铅淬火冷拉钢丝
17.
Register of Serially Numbered and Controlled Forms (20 Leaves) [GF 298A]
连续编号及管制表格（20页）〔通用表格第298A号〕
18.
Sales (Profits / Steel output) plunged by 20 %.
销售额(利润／钢铁)产量猛跌了20％。