... and convenient 3.Simple operation 4.Maintenance convenience 5.High drilling efficiency A, ZQSJ-90/2.4 Portable Pneumatic Flame-proof ... a)≤94Weightkg22B,ZQSJ-90/2.4 Portable Pneumatic Flame-proof Drilling Machine detailed illustration,C,ZQSJ-90/2.4 Portable ... Pneumatic Flame-proof Drilling Machineproduct features and use1.Light weight2.Mobile and convenient3.Simple ...