精品国产成人亚洲午夜_欧美小屁孩cao大人在线播放_天天躁夜夜躁狠狠久久成人网_国产乱婬av片免费不_军婚吃奶h巨肉1v1_中文有码在线视频_极品在线视频大陆国产_丁香综合激情久综合色_日韩美女福利视频网站_色色五月天激情免费电影

Quality Commitment The company promises that under the premise of correct selection, installation and use of the ball valve, the quality guarantee period of the ball valve is two years after the product is shipped. During the warranty period, if the product is damaged or cannot work normally due to poor manufacturing quality or material defect, the company is responsible for repairing and free replacement of parts. If the equipment fails due to non-quality problems caused by improper operation or external irresistible factors, the company organizes or assists maintenance according to the needs of users. After the expiration of the warranty period, the company will continue to provide services according to the needs of users, and ensure an adequate supply of spare parts.