四川BBBBBB搡BBB搡BBBB,影音先锋成人AV资源,国产又粗又猛又爽又黄的,香蕉视频一区二区

Casting coupling

The production process of parts is long and the process is complex, especially the hardness of ratchet tooth surface is hrc54-62, the depth of effective hardening layer is more than 3.6mm, the surface roughness is Ra0.8, the concentricity of inner hole and outer circle is 0.01mm, and the precision is high.

axle sleeve

The products are processed by welding after circle, which requires high welding requirements. All ut flaw detection is required after welding, and the welding seam is grade 2. The roughness should be less than 0.8 and the precision should be less than 0.05mm

Bearing pedestal

Long intermediate sleeve

Thread wheel

Untitled 3

American weldment 1

Coupling 2

Coupling

Online Message

If you need, please leave your contact information and we will contact you within 24 hours

Contact Us

E-mail:changzhouqingfeng@qfykjx.com

Address:No. 68, Diligent Road, Xuejia Town Industrial Park, Xinbei District, Changzhou City, Jiangsu Province

Phone:0519-85286225

Copyright ? 2025  Changzhou Qingfeng Yikang Machinery Co., Ltd.   All Rights Reserved

ICP:蘇ICP備15040667號(hào)-1

久久国产精品影视 | 国产一区 在线不卡 | 亚洲精品女人久久久 | 性感尤物波多野结衣插人 | 一级a爱做片在线观看免费网站 | WWW.亚洲无码 | 69久蜜桃人妻无码精品一区 | 人妻少妇无码一区二区性色av | 草莓视频一区二区三区 | 少妇又紧又大又湿又爽视频 | 内射在线无码91 | 无码精品人妻一区二区三区综合部 | 国产乱婬AV麻豆剧传媒牛牛影视 | 海角视频一区二区 | 高潮无套内谢秘书 | 国产全肉乱妇杂乱视频在线看 | A V无码成人片在线观看 | caoporn12超碰电影蜜桃 | 免费一级无码婬片A片多娇美 | 老熟女太老了88∧V 91香蕉嫩草国产视频 | 久久男女动作刺激大片 | 芒果tv成人毛片在线播放免费 | 国产成人无码精品色欲天香 | 亚洲AV成人片色在线观看高潮 | 无码久久人体做爰大胆A片片片 | 老熟女老熟妇高清AAAAA片 | 中国 免费 av| 国产成人18AV视频 | 免费无码成人又爽又高潮 | 亚洲国产精品人人爽夜夜爽 | 日本高清免费不卡一区二区三区在线 | 成人网址网18秘 免费 | 嫩草AV久久伊人妇女超级a | 国产精品高潮呻吟久久 | 国产亲妺妺乱A片免费观看 日本91无码精品秘 入口 | 免费一级毛片高潮喷水 - 百度 | 精品人妻少妇一级毛片免费 | 99久久久久国产大白奶 | 精品国产乱码久久久久久1区2匹 | 亚洲vs无码秘 蜜桃少妇 | 欧美人妻五区六区在线 |