نمایش نتیجه 1 تا 2 از 2 نتیجه یافت شده برای drilling template:
n: see temporary guide base.
n: the initial piece of equipment lowered to the ocean floor once a floating offshore drilling rig has been positioned on location. It serves as an anchor for the guidelines and as a foundation for the permanent guide base and has an opening in the center through which the bit passes. It is also called a drilling template.
© ۱۳۹۲-۱۳۹۷ این اثر شامل قانون حمایت از مولفین بوده و هرگونه کپی برداری از آن ممنوع است.
