你即將離開本站

並前往https://codelibrary.amlegal.com/codes/newyorkcity/latest/NYCrules/0-0-0-323

Chapter 10: Drums for Derrick Load and Boom Hoists

Drums for derrick load and boom hoists shall be contained on the same bedframe operated independently by one or more engines.

確定！ 回上一頁

查詢 「Boom derrick」的人也找了：

  1. Crane boom
    2.
  2. Boom derrick
    3.
  3. Oil well
    4.
  4. Guyed mast
    5.
  5. Drill rig
    6.
  6. Sheerlegs
    7.
  7. Lifting crane
    8.
  8. Pumpjack
    9.