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-1

欧美成人午夜无码A人与鲁 日韩无码看片毛片网站黄色 | 寡妇高潮一级毛片免费看大胸 | 免费一级婬A片AAA毛片古女 | 男人天堂无码动漫AV | 午夜视频试看日本 | 亚洲欧美性受久久久999 | 欧美精品久久久久久 | 17c蘑菇国产精品一区二区 | 黄瓜国产在线一区二区 | 欧美 中文字幕成人 aⅴ | 國產親子亂伦A片免费看 | 一级婬片A片AAAA毛片A级 | 日本无码人妻丰满熟妇5g影院 | 无码人妻丰满熟妇乱又视频 | 日本一道一区久久 | 第一福利丝瓜AV导航 | 白乳爆浆美女裸体网站 | 在线ab 视频观看 | 色妞在线综合亚洲欧美 | 日韩精品系列在线播放 | 高潮 喷水 白浆的视频 | 日韩精品一区二区三区, | 一区二区三区四区视频免费看 | 成人免费视频 网站在线观看 | 免费看天天操夜夜操 | 人妻少妇嫩草被猛烈进入无码蜜桃 | 国产AⅤ精品A片一区二区网站 | 国产一区二区在线观看www. | 无码人妻丰满熟妇BBB无码视频 | 精品国产一区二区三区四在线看 | 国精品人妻无码一区二区三区喝尿 | 任你躁久久久久久老妇App | 久久精品国产人妻无码 | 一级a免一级a免做免费线看内裤 | 夜色中文乱伦导航大全 | 1岁粉嫩小泬无无码在线观看套 | 精品人妻无码观看 | 最新国产免费不卡簧片 | 91国偷自产一区二区三区蜜臀 | 日批舔批视频在线 | 护士性做爰A片免费看 |