Design and construction of solar hot water system in qiaozhi residential quarter 乔治住宅小区太阳能热水工程的设计及旋工
2.
Three group capping consist of first rotating and re - rotating the degree of moment may be adjusted singlely . ensure that will be tight . the machine has clutch to avoid the cap over - rotating 旋盖分初旋、复旋工三组，扭矩大小均可单独调节，保证旋紧，并带有离合装置而不回过紧，损伤盖子。
