The advanced hydraulic system has self-return and drill rod stuck proof implements, which ensure great maneuverability and reliability.
先进的液压系统有自我的回报和钻杆坚持证明实施，确保伟大的机动性和可靠性。
2
The results show that the long rod insulator features light weight, better anti-ageing performance, better anti-pollution behaviour, high tensile strength, puncture-proof and easy maintenance.
结果表明，棒形悬式瓷绝缘子重量轻，抗老化性能好，耐污性能较好，拉伸强度高，不可击穿，使用维护简便。
3
The structural layout and calculation method of space truss with inclined rod and mast, joint construction, material selection, fire proof design a nd coating selection etc.