A Research on standardization of elbow flow meters
li zhi~1; wang chi~2(1.hebei polytechnic university ; tangshan hebei 063009; china; 2.national institute of metrology p.r.china; beijing 100000; china)
Application of Soil Nailing for Excavation Retaining in Residence
zhang su-min~1; tong sheng-bao~2 (1.civil engineering and architecture department; hebei institute of technology; tangshan hebei 063009; china; 2.tangshan construction quality supervisor station; tangshan hebei 063000; china)