Zobrazeno 1 - 1
of 1
pro vyhledávání: '"drilling orientation device for drilling rig"'
Publikováno v:
Gong-kuang zidonghua, Vol 45, Iss 8, Pp 92-96 (2019)
In view of problem that existing drilling orientation device for drilling rig can not meet actual demand in terms of measurement accuracy, cost and operability, a drilling orientation device for drilling rig was designed which combines north-seeking
Externí odkaz:
https://doaj.org/article/22ef0859aaa94d479f9c30898062a02c
