日韩人妻熟精品久久无码少年阿宾,亚洲精品中文字幕无码视频,少妇被粗大的猛烈进出视频,国产性猛交╳XXX乱大交,亚洲av乱码一区二区三区,久久av免费天堂小草播放,无码无套少妇毛多69XXX,丁香花在线影院观看在线播放,欧美精品视频免费观看,国产内射999视频一区

Changzhou Liyu spring Co., Ltd

Compression spring·CUSTOMIZATION




cylindrical helical compression springcone shaped compression springwave spring

The shape of a compression spring is generally a spiral shape that can be compressed along the vertical axis of the rotating spring wire. The coil spring is the most common spring design. Under normal circumstances, the compression spring will be sleeved on the connecting rod or installed in the hole to work. When pressure is applied, The compression spring will be compressed short, and it will generate stress in the opposite direction and return to the original size. The compression spring can provide a reaction force against the linear pressure. In fact, it is recognized as one of the most effective energy storage devices.

Technical parameters of cylindrical spiral compression spring

To customize the compression spring, you need to provide the following necessary parameter information:
Wire diameter d: mm (Note: the diameter of the spring wire)
Outer diameter D2: mm (Note: the diameter of the outer circle of the spring)
Length L0: mm (Note: the free height of the spring)
Number of circles Na: circle (Note: the total number of turns of the spring)
For customized compression springs, you also need to provide the following technical requirements:
turn around: (Description: Left-handed\Right-handed)
Material requirements: (Such as: stainless steel wire SUS, carbon steel wire SWC, piano wire SWP, copper wire... etc.)
Surface treatment: (Description: blackening\galvanizing\nickel plating\chrome plating\baking paint\powder spraying\electrophoresis\shot peening\dacromet\electrolytic polishing...etc.)
End form: (Explanation: Tighten\Grind\Tightly polish)
Strength requirements: (Note: Elastic performance, other technical requirements, etc.)

Spring end characteristics

Structural Features

  • Cylindrical
  • Conical
  • Barrel
  • Hourglass
  • Closed at both ends
  • Two End opening
  • Shrink both ends
  • The ends are flat
  • The ends are not flat
  • Fixed pitch
  • Variable pitch
  • Surface treatment

  • Blackening
  • Zinc plating
  • Nickel plating
  • Shot Peening
  • Polishing
  • Dacromet
  • Apply anti-rust oil
  • Electrolytic polishing
  • Teflon spray
  • Wire diameter specifications

  • 0.1~6mm
  • Materials

  • Carbon spring steel wire SWC
  • Nickel-plated wire, galvanized wire
  • Piano wire SWPB
  • Copper wire, phosphor copper wire, beryllium copper wire
  • Stainless steel wire SUS301, SUS302, SUS304, SUS316, SUS631
  • Square wire, flat wire, semicircular wire
  • 65Mn
  • Alloy material wire
  • 82B
  • Other special specifications steel wire
  • 55CrSi (SWOSC-V)
  • compressions

  • Phone :86-519-82329557 / 82338435 Telephone :?13235185183(QQ\Wechat) 13901490575(Wechat) Email :? info@czliyu.com Skype:? liyuspring@outlook.com Address :?No.6 Houguan Road, Jincheng Town Industrial Park, Jintan District, Changzhou City
    精品亚洲a∨无码专区毛片| 三级片无码在线观看大尺度| 国产日产韩产一区二区精品无码| 亚洲欧洲日本在线观看| 一级一级女人18毛片| 爱妺妺国产AV网站,乱精品一区字幕二区| 亚洲男人A∨资源网| 成人午夜爽爽爽免费视频| 91自慰喷水流白浆免费观看| 久久精品国产亚洲αv忘忧草| 思思久久婷婷精品在热线热| 成年女人黄小视频| 少妇极品熟妇人妻| 精品国产AV一区二区三| 久久精品无码精品免费专区| 国产美女裸体无遮挡免费视频高潮| 人妻少妇久久中文字幕一区二区| 免费三级网站国产性自爱拍偷| 亚洲日韩国产精品无码av按摩| 四虎国产精品永久在线乐播| 中文字幕 精品三区 | 伊人久久大香线蕉av一区| 人妻中出受孕 中文字幕在线| 欧美精品午夜久久久伊人| 在线a亚洲ⅴ天堂网2018| 非洲黑人吊巨大VS亚洲女| 放荡的美妇在线播放| 人妻无码中文久久久久专区| 愛妃影视?无码国产精品一区二区| 国产人成无码视频在线观看| 欧美日韩专区麻豆精品在线| 日韩精品一区二区三区视频| 久也在线中文字幕手机在线| 亚洲午夜高清国产拍| 国产无遮挡色视频在线观看| 亚洲国产精品国语在线| 久久久国产精品萌白酱免费| 亚洲永久国产一级大片在线观看| 高潮呻吟久久av无码午夜鲁丝片| 久久av无码午夜鲁丝片| 亚洲日本中文字幕天天更新|