... Saving money, compact construction, easy moving Core Drilling Rig 1,Drilling depth can reach 30-200m2,Steel’s quality ... geological exploration, exploration of high building construction, rivers construction, civil water well7, It can do standard penetration test, can use auger drilling ... depth30--200m End hole caliber500-75mm Drill rod caliber50mm Drilling angle90°~75° Drill weight (No include power) ...