鎖接頭、鉆桿接箍     Drill Rod Box and Pin/Drilling Coupling

鎖接頭生產規(guī)格(Description of Box and Pin):  φ57、φ65、φ75、φ121

鉆桿接箍生產規(guī)格(Description of Drilling Coupling):  φ57、φ65、φ75