It doesn't have and causes that there's pit on revetment brick due to nut protrusion.Within the existing embodiment, the amount of counterbore and fixation hole isn't minimal เสาเข็มคอนกรีตเสริมเหล็กอัดแรงโดยใช้แรงเหวี่ยง The advantageous consequences of adopting the above mentioned-outlined even further scheme are that simple composition, the framed Procedure is stable. vt https://intelligent-equipment51593.newbigblog.com/39641499/spun-pile-things-to-know-before-you-buy