A-frame

From WebRef.org
Jump to navigationJump to search 160x600
  1. Two poles or legs supported in an upright position by braces or guys and used as a drill mast. Long
  2. An open structure tapering from a wide base to a narrow load-bearing top. Nichols, 2
    Source: Dictionary of Mining, Mineral, and Related Terms


Sponsor: å­¦ã?¶ã?“ã?¨ã?¯ã?Šå¥½ã???実用的ã?§ãƒ—ロフェッショナルã?ªã‚¹ã‚­ãƒ«ã?®ã‚®ãƒ•ãƒˆã?§å­¦ã?³ã?¸ã?®æ„›ã‚’示ã??ã?†ï¼?対象コースã?Œ ï¿¥1,500ã?‹ã‚‰ï¼?