کلمه standard derrick یافت شد:
n: a derrick that is built piece by piece at the drilling location, as opposed to a jackknife mast, which is preassembled. Standard derricks have been replaced almost totally by jackknife masts. Compare mast.
n: The derrick that four legs extended to crown block and fixed with base in the mouth of a well.
برای نمایش کلمات مرتبط نیز اینجا کلیک کنید!© ۱۳۹۲-۱۳۹۷ این اثر شامل قانون حمایت از مولفین بوده و هرگونه کپی برداری از آن ممنوع است.
