... 方钻杆补心海拔高度 ekb 方钻杆 grief joint; grief kelly; grief stem; keklly vara cuadrante; kelly bar; kelly joint; kelly rod; kelly stem; kelly vara cuadrante de perforacion; square drill rod; square kelly; square shaft 带槽方钻杆 fluted grief stem ...
Kwan Kee JFZ series squareshaft handle high quality standards of raw materials, and application of high-tech precision manufacturing technology to ensure product quality.
钧记JF Z系列方轴执手采用高品质标准原材料，同时应用高新精密制造工艺技术，确保产品的高质量。
2
The shaft shall be hexagonal or square to ensure positive rotation of the disc and be totally sealed from exposure to the process liquid.
阀杆应该是六角形或方形，以确保阀瓣能够灵活旋转，并且完全密封，不会暴露在处理的液体里。
3
It is the middle of a slender wooden shaft with a hollow circle at both ends of each round, round a few weeks to open mouth square posts.