Txhawm rau kom txaus siab rau qhov zoo ntawm threaded steel tuav, cov kev txiav txim hauv qab no tuaj yeem kos.1. Chemical composition identification Content Analysis of C, Si, Mn, P, S, thiab lwm yam hauv Rebar Cov tshuaj muaj pes tsawg leeg yuav tsum ua raws li ASTM, GB, DIN thiab lwm yam qauv.2. Mechanical kev ua tau zoo t...
Nyeem ntxiv