天堂网在线最新版WWW资源网_一区二区国产在线播放_久久久久国产精品二国产_亚洲女婷婷婷婷五月_国产日韩AV免费无码一区二区三区_国产精品色视频一区二欧美_武侠古典久久亚洲精品_免费午夜乱人伦精品视频在线_亚洲精品女人成人久久久_强奷漂亮雪白丰满少妇AV

tangshan tiankun metal tool manufacturing co., ltd
搜索

tangshan steel shovel

  • author:管理員

  • classification:news center

  • label:212

  • code:599

  • time:2021.01.11.10:35

Information details:

luannan county is located in the core area of bohai economic circle and beijing tianjin hebei metropolitan area, with complete infrastructure. luannan county is a famous steel spade production base, with an annual production of more than 300 million steel spades and hardware tools, accounting for 90% of the country's export volume, and an annual export of 80 million us dollars. in recent years, luannan county, hebei province, the "hometown of steel spade", has guided enterprises to increase product research and development, and promoted the development and upgrading of steel spade industry. at present, there are 182 steel spade enterprises in the county, and the products are exported to more than 140 countries and regions.

1
2
3

Information you may be interested in

title:steel shovel town

time:2021.01.11.10:37
introduce:luannan county takes the transformation and upgrading, innovation and development as the main line to make the traditional characteristic industry bigger and stronger. through the transformation of mode and structure, it constantly innovates the reform ideas and measures, builds the steel shovel town with high quality, focuses on promoting the high-quality development of the steel shovel industry, and drives the traditional characteristic industry to radiate new vitality. recently, the provincial development and reform commission announced the list of the first batch of characteristic towns in hebei province (jite town lianban [2017] no. 1). luannan county, china steel shovel town on the list of cultivation category.

title:quality of steel spade

time:2021.01.11.10:36
introduce: as a kind of common metal products, steel spade is widely used in agriculture, construction and other industries. the quality of steel spade depends on the production process and heat treatment process of steel spade. the heat treatment process of steel includes annealing, normalizing, quenching and tempering and surface heat treatment. tempering includes high temperature tempering, medium temperature tempering and low temperature tempering. tempering is to reheat the quenched steel to a certain temperature and then cool it by a certain method. its purpose is to eliminate the internal stress produced by quenching, reduce the hardness and brittleness, so as to achieve the expected mechanical properties.
主站蜘蛛池模板: 苍溪县| 屏边| 潮州市| 商水县| 芒康县| 仪征市| 吴忠市| 绥宁县| 聂拉木县| 商水县| 如皋市| 永春县| 固镇县| 襄汾县| 平山县| 同德县| 诏安县| 孟连| 芦溪县| 惠安县| 泾源县| 辉县市| 淮南市| 定结县| 墨脱县| 房产| 甘孜| 丰城市| 广宗县| 奇台县| 遵化市| 华蓥市| 陵水| 洪泽县| 汉阴县| 台北县| 漾濞| 盘锦市| 临沧市| 西充县| 保山市|