松开赤经兼小时刻度环的定位螺丝后把赤经兼小时刻度环“0小时”位置对准赤经指示箭头。
Set "0 hour" on the R. A. and hour graduation ring to the R. A. indicator after loosening the graduation-ring setscrew.
装置包括热力塑型腰部定位带和两侧D型环组合而成可固定工作人员位置，给予后撑保护。
It includes thermoplastic positioning waist harness and D-style collars on both sides, and is able to fix user's position, and provide back brace protection.
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