Existing Circumstances of Design and Research on Hydraulic Rock Drills and Related Opinions in China
FU Yue-hua;,LI Ye-lin;,LU Zhi-xin;,ZHOU Zhi-hong;

..............page:1-6

Three-Point Bit of φ38～φ42mm Shall Become Leading Products among the Small-Diameter Conbits for Rock Drilling Progressively
jin cheng yong ;, yang hai shu ;, ye ling yun ;, zhang guo zuo ;, zhang han bin ;, zhang hua qing ;, zhao shu tao ;, zhou zuo ;

..............page:7-13

Analyses of the Developmental Trends of Pneumatic Rock Drilling Machines
LIU En-guo;

..............page:14-16

Application of DNC System in Drill Tools Production
WEI Yuan-cheng;

..............page:17-21,28

Application of Surface Profile Gauges in the Drilling Tool Inspection
ZENG Xu;

..............page:22-24

Research on the Pneumatic-hydraulic Rock Drill
YAN Gui-lin;,ZHANG Mei-ya;

..............page:25-28

Inhibition of Speed Overshoot in FANUC DC Spindle Driving Speed Control System
LIANG Da-ping;,ZHANG Zhong-wang;

..............page:29-33

Analysis of Disc Cutter Ring Material in Shield Machine
LI Shi-hong;,LIU Fu-lai;,LU Jin-ren;,LV Zhi-feng;

..............page:34-41

The Heat Treatment Process for the Valve Case Pad in G10 Pneumatic Digger
ZHOU Liang;

..............page:42-44

Analyses of the Usage Effect of the Hydraulic Tunneling Drilling Rigs in Tunnel Drifting
GUI Hua-lian;,LI Yao-wu;,TIAN Wei;,YANG Hai-rong;

..............page:45-49

Separate Plunger-Type Hydraulic Hammer with One Oil Line
YANG Xang-bi;

..............page:50-56

jue jin ji ji zai ye ya qu dong chu chen xi tong de yan jiu yu ying yong
li jian feng ;

..............page:57

zjyd-1500 fan jing zuan ji ye ya xi tong gu zhang fen xi ji dui ce
li jian feng ;

..............page:58

hun he ji xing kong qi ya suo ji zi dong jian kong ji shu yan jiu ji ying yong
li jian feng ;

..............page:59