closed traverse loop 闭合导线环
folded closed strip traverse loop 折叠形闭合导线环
traverse loop
遍历循环
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Loop traverses consisting of more than 6 stations shall be cross braced by at least one additional cross measurement for every 6 additional points in the traverse.
包含多于6个站的循环导线应在线内每增加6个点进行至少一个附加交叉测量的交叉联接。
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