韩国伦理三级一区二区-少妇人妻偷人精品视蜜桃久久九七-亚洲AV片一区二区三区-免费做一级A潮视频-91精品国产1区-麻豆人妻

Welcome to Shenzhen STR Hardware Products Co., LTD.

  1.  
Industrial News

Home  -  News  -   Industrial News

Is the development of machining technology very good?

As the times are constantly changing, there are many processing technologies around us, each of which is different. In the industry, we have made different contributions. Precision machining is one of them, then machinery. Is the development of processing technology very good?

Before the industrial revolution, machinery was mostly made of wood by hand, and metal (mainly steel and iron) was only used to make small parts on instruments, clocks, locks, pumps and wood-framed machinery. Metal processing relies mainly on the craftsman's fine workmanship to achieve the required precision. With the widespread use of steam engines and the consequent development of large machinery such as mines, metallurgy, ships and locomotives, more and more metal parts are needed for forming and machining. The metal materials used are developed from copper and iron to steel. the Lord.

Machining (including casting, forging, welding, heat treatment and other equipment and cutting technology and machine tools, tools, measuring tools, etc.) has developed rapidly, thus ensuring the supply of various mechanical equipment required for the development of production. At the same time, with the increase of production batches and the development of precision processing technology, it also promotes the formation of a large number of production methods (partition interchangeability, professional division and cooperation, flow processing lines and assembly lines).

Previous:No news

Next:The role of precision machining

Copyright 2018-2020 Shenzhen STR Hardware Products Co., LTD. All Rights Reserved.
Add:Building 8, Songgang First Industrial Village, Songgang Street, Bao'an District, Shenzhen,China.
Contact:Mr.Lu 13714851595 Tel:0755-29891116 Fax:0755-27673791
Email:luliangguo@szstorge.com
主站蜘蛛池模板: 老牛影视一区二区 | 亚洲成人一区 | 亚洲一起AV在线 | 2025午夜品在线观看 | 一区二区免费在线视频 | 最新vrav在线| 激情四房色播 | 色欲久久久 | 强奸乱伦1区2区3区4区 | 91自国产 | AV偷拍一区二区三区 | 色悠悠视频在线观看 | 91麻豆视频在线 | 国产精品欧美日韩色窝窝 | 久久久久免费毛A片免费一瓶梅 | 97免费人妻视在线视频密挑 | 国产美女裸体永久无遮挡香港剪辑 | av影视在线 | 国产蝌蚪91熟女秘 入口 | AV免费在线免费观看 | 国内精品国产三级国产AⅤ久 | 在线一区无码 | 男女污污污免费网站 | 91最新国产 | 亚洲熟妇无码八AⅤ在线播放 | 性做久久久久久 | 高清无码又污又黄的官网 | 午夜国产精品成人 | av片免费| 三级喂奶真人做爰 | 国产精品嫩草影院AV蜜臀动漫 | 91哺乳期少妇在线 | 最新日韩av | 亚洲成人AV。 | 久久精品无码网站 | 国产裸体精品无码 | 国产喷水1区2区3区咪咪爱AV | 成人影视一区二区三区 | 国产精品极品白嫩在线播一区黑料 | 国产做受 高潮素材喷水网站 | 家庭乱伦一区二区三区 |