Txhawm rau kom ntseeg tau tias kev ua haujlwm txhim khu kev qha ntawm lub tshuab nqa, ob chav nres yog teem rau hauv lub tshuab, txhua tus nres tuaj yeem nres tus nqi tag nrho, thiab nws cov coefficient yog 1.25.Vim lub inclined tsim ntawm cov hlua hlau thiab qhov ua tau ib feem ntawm kev thauj khoom thaum nqa billets, cov hlau ...
Nyeem ntxiv