When the rotary rod moves in an upper limit position, rotation of the rotary rod can be automatically stopped.
转杆移至上极限位置时可自行停止转动。
2
Compared with normal rods, the carbon fibre coiled rod behaves much more advantages, such as lighter weight, better elasticity, resisting corrosion, higher fatigue limit, etc.
碳纤维连续抽油杆与普通抽油杆相比具有质量轻、弹性好、抗腐蚀、耐疲劳等优点。
3
As a no-rust, non-pitting tube it is superb, yet it brings even further benefit: We can fit the piston with a magnet and operate tie-rod mounted limit switches - a unique feature!