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单选题
Install packing and backup rings on bearing. Slide bearing into cylinder until bottomed.
A
Install packing and support rings on bearing. Glide bearing into cylinder until it is bottomed.
B
Install packing and backward rings on bearing. Slash bearing into cylinder until the bottom is visible.
C
Install packing and alternative rings on bearing. Skid bearing into cylinder until you see the bottom.
答案解析
正确答案：A
