extension n hanger 尾管悬挂器
N C Hanger 标签
hanger n
吊架n
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Bolt (n. ) metal secured into a drilled hole in the rock as means of protection. Often accompanied by a hanger, an eyelet to which a carabiner can attach.
一种金属器材，通常钉在岩石上作为保护点，上面有洞可以连接钩环。
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