成人综合婷婷国产精品久久,亚洲国产无套无码AV电影,亚洲精品AⅤ中文字幕乱码,国产好大对白露脸高潮

Chongqing Gearbox Co., Ltd. has researched and developed various types of marine gearboxes, including relevant drawings and standards for the design, manufacture and test of products of GW, GV, and GC series. Our companyalso has mastered the core technology of marine gearbox design and processing so theunique needs of users can be met. According to the development needs of our company as well as the current domestic and international market demand for marine gearboxes, our company has carried out the research and development of the gearboxes of GQ/GA series and the jack-up lifting gearbox of the jacking systemof offshore drilling platform, and has undertaken many national key research projects. Thus we have accumulated rich experience in such aspects.