中间面;中界面
He can tie a bowline.
他能系帆角索。
The bowline has worked loose on me during long routes, however the'improved bowline'is something I use when I am sport climbing and falling off is more frequent.
称人结在我爬长路线曾经松开,而爬短路线且很常坠落时我会用改良版称人结。
They're called bowline knots.
他们称之为单套结。
Double bowline is used by many climbers as their primary knot.
双布林结通常是攀登者最初使用的绳结。
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