For added holding and pulling strength, drive four nails through the snake and the drilling line, and wrap the snake with soft wire and tape the entire length.
为了增添抗拉强度，在穿接绳器的部位，再钉四个钉子，然后用铁丝和胶带包起来。
2
To help researching the lunar radio telescope, the transmission coefficient of odd mode four-wire transmission line transformer is derived.
本文为了配合月球射电仪天线的研究，推导了奇模四线传输线变压器的传输系数。
3
Moreover, three-phase four-wire active filters can suppress zero line current, and solve symmetric problem of system effectively.