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The lower end of the inner upper rod is connected to a lower rod sleeve.
在上杆的内下端连接到一个较低的杆套。
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The slender end of the lower rod sleeve passes through the inner upper rod.
中下细长杆套筒年底经过内部上层棒。
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The slender end of the lower rod sleeve passes through the inner upper rod.
中下细长杆套筒年底经过内部上层棒。
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