国产色诱视频在线播放丝袜,国产丝袜无码一区二区三区,无码人妻丰满熟妇区五十路免费中文午夜精品久久久久久,精品高潮呻吟99AV无码视频,精品无码一区二区三区蜜臀很多小伙伴都喜欢看短视频,久久精品国产亚洲AV未满十八,99在线精品国自产拍中文字幕,国产精品一区不卡在线观看

The stainless-steelmill of Xingtai Steel successfully developed 3 new kinds of stainless steel in the first half of the year
  come from:FASTENEROF CHINA 2017-8-5 Updatetime:2017-08-08 Hits:

  In order to further develop the stainless-steel marketand meet the needs of more users, in the first half of the year, the stainless-steel mill of Xingtai Steel successfully developed and produced 3 kinds of stainless steel: 42Cr10Si2Mo, 439 (including Ti), 4Cr13. 42Cr10Si2Mo is the first kind of heat-resistant stainless steel used in heat-resistant bolts.

  40Cr10Si2Mo is amiddle and high-end product of valve steel series. It is the necessary material for making gasoline engines and diesel engine valves, and also the critical material of the engine.Currently, the product has been on trial on domestic famous engines; 439 is a kind of ferritic stainless steel which added the stabilizing elements such as Ti on the base of 0Cr17. Compared with 0Cr17, the intergranular corrosion resistance, formability and weldability of this steel are improved. 40Cr10Si2Mo can be used in automobile exhaust system component, tableware and so on. At present, the product is mainly used in an American company which is the world famous kitchen ware supplier; 4Cr13 is a kind of high-carbon martensitic stainless steel which has the characteristics of high hardness, good abrasion resistance and a certain degree of corrosion resistance. It is mainly used for the production of high hardness and high wear resistance of the cutting tools, nozzles, shafts, valve blocks, valve bearings and other components.

  The successful research and development of three steel products greatly improved the market competitiveness of our company’s stainless-steel products.

国产精品久久久久久久久齐齐| 亚洲国产成人无码av在线| 精品亚洲成A人无码成A在线观看| 日韩在线观看一区二区不卡视频| 国产成人一区在线播放| 97久久精品亚洲中文字幕无码| 久久精品一区二区白丝袜自慰| 99精品视频九九精品视频| 国产在线观看激情| 五月天婷五月天综合网| 久久免免费人妖视频| 竹菊影视欧美日韩一区二区三区四区| 97人人看碰人免费公开视频| 国产亚洲精品国产福APP| 欧美国产人妖另类色视频| 日韩中文字幕推理片| 欧美乱码伦视频免费| 久久久久精品无码专区| 无码精品国产VA在线观看DVD| 亚洲精品在看在线观看高清| 麻豆国产一级av| 伊人无码精品久久一区二区| 国内精品第一页| 亚洲三区欧美一区二区在线| 片多多免费观看高清影视| 日韩a片免费无码完整版电影| 激情国产AV做激情国产爱| 人妻AV无码系列一区二区三区| 最近好看的2019中文在线一页| 日韩久久久精品首页一本在线免费视频| 国产免费av片在线观看播放| 欧美极品JIZZHD欧美| 最新国产真实乱子伦| 国产真实乱子伦精品视手机观看| 国产精品三级电影在线观看| 羞羞色男人的天堂国产| 日韩毛片高清在线观看| 色悠久久久久综合网国产| 亚洲熟妇无码一区二区三区| 免费国产A国产片高清| 久久人人玩人妻潮喷内射人人|