One end of the draw rod fixedly connected with the outer end of the telescopicrod is connected with a safety draw hook.
所述的伸缩杆的外端固定连接有牵杆,在该牵杆的端部连接有保险牵引钩。
2
The side surface of a port of the lower tube is provided with a notch which is provided with a clamping and fixing device of the telescopicrod.
下管的 端口侧面开设有缺口,缺口处设有伸缩杆的卡固装置。
3
One end of a probe telescopicrod is provided with an ultrasonic sensor, a flow velocity determinator, a pressure sensor and a vacuum piston water sample collector.