نمایش نتیجه 1 تا 3 از 3 نتیجه یافت شده برای dolly:
n: see pipe dolly.
n: A small handcart used to carry the casings to the drill platform
n: on a top-drive unit, the device that attaches the unit to the guide rails. See guide rails, top drive.
n: any device equipped with rollers and used to move drill pipe or collars. It is usually placed under one end of the pipe while the pipe is being lifted from the other end by an air hoist line.
© ۱۳۹۲-۱۳۹۷ این اثر شامل قانون حمایت از مولفین بوده و هرگونه کپی برداری از آن ممنوع است.
