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The properties of the sand were tested according to ASTM C136 and the results are presented in Table 3. 2.1.4 Crushed stone Crushed stone obtained from the same quarry as rock chips was used as the coarse aggregate. 2.2 Mix proportions of high strength concrete small hollow blocks Table 4 Mix proportions of high strength concrete small hollow blocks Notation Cement Water Coarse aggregate Fine aggregate Rock chips Sand RC50-1 360 162 914 274 640 RC55-2 360 162 823 402 603 RC60-3 360 162 731 549 548 RC65-4 360 162 640 713 475 RC70-5 360 162 548 896 384 BMP 340 153 667 868 372 2.3 Preparation of the blocks specimens The high strength concrete small hollow blocks were fabricated in steel moulds with internal dimensions of 390mm in length, 190mm in width, 190mm in depth.

Fujii, “Frictional characteristics of an aerostatic linear bearing”, Tribology International, Vol.39, No.9, pp.888-896, 2006

Rock Electrical parameters in Cercana-Don Jovier exploring area Rock types Amplitude frequency F(%) Resistiivity ρ(Ωm) Range Average Range Average quartz sandstone 1.7-4.0 3.0 247-2924 902 chert 0.7-2.9 1.3 574-6540 2176 dacite 0.2-3.8 2.7 283-3343 1478 monzonite 0.1-3.5 1.5 56-2314 275 Monzonite porphyry 0.1-2.5 0.7 108-896 313 breccia 0.1-2.0 0.9 391-4277 1139 Oxidized copper ore 0.2-0.4 0.3 246-483 365 Pyritization, copper mineralization porphyry 1.7-12.5 5.5 151-9221 2353 For the quick identification of existence of deep ore-bodies in copper mineralization porphyry bodies and breccias bodies, DFIP method has been applied in the area.

Journal of Shanghai Jiao Tong University, 2003, 37(6): 982-896

Materials Letters. 2009;63:896-8

Sin. 46 (2010) 890-896.

Weissman, Steve Bobrowski. the design of the force.com multitenant internet application development platform[C], SIGMOD，Rhode Island, USA, 2009, 6, 29: 889-896 [7] Haidong Chen.

Volchkova, Selecting clinical and laboratory methods of manufacture of orthopaedic titanium alloy structures using a biopotentiometer, Current science. 114(4) (2018) 891-896

And the λ level cut set of the maximum equivalent stress eσ~ is ],[ λλ dc , where λc is gained by transforming 0P , 1C and F in Eq. 17 to (120-14.142 λln− ), )ln 000896.00064.1()ln084.0ln282.607.623( λ λ λ − + −−− and )ln57.3570/()ln536.3500( λ λ −+ −− respectively, λd is gained by transforming 0P , 1C and F in Eq. 17 to (120+14.142 λln− ), )ln 000896.00064.1()ln084.0ln282.607.623( λ λ λ − − −−+ and )ln57.3570/()ln536.3500( λ λ −− −+ , respectively.

Thus, the work-hardening characteristics of the selected material can be expressed in the form of power law by [7,10] s = 794.3e 0.11 (MPa) . (1) Table 1 Tool and process parameters Parameters Values Initial billet diameter(D0) 32mm Punch diameter(DP) 23.2mm, 24.4mm, 22.6mm Mandrel diameter(Di) 15.2mm Forward diameter(DF) 22.6mm Initial billet height(H) 30mm Die angle(b) 17º Punch stroke(hs) 25mm Forward tube thickness(W1) 3.7mm Backward tube thickness(W2) 3.3mm 3.8mm 4.4mm Punch nose radius 0.905, 1.905, 2.905 0.83, 1.83, 2.83 0.74, 1.74, 2.74 Punch face angle 160º , 180º Friction factor 0.1, 0.2 Die corner radius (R2, R3) 1mm, 2mm 0.74 2770 300 76 101 1210 360 647 1360 1.74 MPa 2290 2440 1390 81 101 1300 689 1340 2.74 2210 2670 1390 88 107 1300 896 1320 R1= 3 4 1 2 2 1 1 1 3 1 4 2 1 21 W2=4.4 R1= 3 Unit : 4  R1= 4 1 2 0 2 4 0 0 1 2 1 0.7 1 1 0.7 1 0.7 2 1.4 2 1.4 2 1.4 3 2.1 3 2.1 3 2.1