大学生疯狂高潮呻吟免费视频-国产肉丝袜视频在线观看-国内精品久久久久久影院-欧美一区内射最近更新

PRODUCTS

Oil production machinery
Pipe products Oil production machinery Castings and forgings

  Sucker rod is one of our main products with the essence of advanced technology from home and abroad. Different categories are organized and manufactured in the accordance with SY/T5029, SY/T6272 and API SPEC 11B, including sucker rods of Grade D, Grade HL and HY, ultra-high strength and polished of ultra-high strength and special sucker rod according to user’s requirements. Some of them are authorized to use API monogram and China Industrial Permit.
  In the manufacturing process, the advanced German direct reading spectrometer is used for material analysis; the magnetic leakage detector is used for flaw detection on the production line one by one; the far-infrared thermometer is used to monitor the forging heating temperature during forging; the thermal insulation or air cooling device is implemented according to the requirements of rod body material to control the cooling rate after forging; the fluorescent magnetic particle detector is used to inspect the forged part of the sucker rod after grinding; the forged rod body is tempered to eliminate the stress in the heating zone and the strength is checked by the hot stretch straightening; the rod body is reinforced by overall surface shot blasting to improve the fatigue strength of the rod before threading; the CNC hex lathe is used for machining of the rod head to realize the PLC industrial control automation; the processing accuracy is rechecked one by one after threading with a complete quality assurance system.
  Sub-surface sucker rod pump is one of main equipment in oil production. The pumps are made through advanced surface nickel and phosphate plating, carbonitriding and carbonnitroboriding featured in corrosion resistance, wear resistance, reliability, durability, and high efficiency. In 2011, the pump and its parts used to be authorized to API monogram.
  The main products:tubular pump, rod pump, multi-functional pump, inclined well pump, sand preventing pump, feedback pump, with Φ 32 - Φ 102mm and strokes of 1.8-8m.

主站蜘蛛池模板: 国产一区二区内射最近更新 | 精品国产乱码久久久久久郑州公司| 在线看片免费人成视久网| 国产98在线 | 日韩| 日韩一卡2卡3卡4卡2021免费观看国色天香 | ā片在线观看免费观看| 国产亚洲av无码av男人的天堂| 18岁日韩内射颜射午夜久久成人| 亚洲av无码潮喷在线观看| 国产果冻豆传媒麻婆精东| 综合偷自拍亚洲乱中文字幕| 又粗又猛又黄又爽无遮挡| av中文无码乱人伦在线观看| 国产sm调教视频在线观看| 国产男同志gay网站| 国产农村妇女精品一二区| 久久精品国产99精品亚洲| 亚洲精品无码久久久久| 天堂最新版在线| 欧美老熟妇乱大交xxxxx| 国产精品三级一区二区| 人人妻人人澡人人爽不卡视频 | 国产a v无码专区亚洲av| 日本肥老妇色xxxxx日本老妇| 人人爽人人爽人人片av| 少妇高潮惨叫久久久久久| 日本簧片在线观看| www成人国产高清内射| 欧美人与动xxxxz0oz小说| 亚洲av无码专区亚洲av网站| 国产精品亚洲综合一区在线观看 | 欧美精品18videosex性欧美| 一本大道无码人妻精品专区 | 毛片免费视频在线观看| 亚洲va久久久噜噜噜久久天堂| 国产av人人夜夜澡人人爽| 国产在线观看www污污污| 日本乱偷人妻中文字幕在线| 亚洲无线看天堂av| 欧美激情一区二区成人| 亚洲国产精品无码专区影院|