1. Strengthen the operator's mechanical knowledge and safe operation knowledge, and provide education and training measures
2. Txhim kho cov cuab yeej tu thiab tshem tawm cov kev phom sij muaj kev nyab xeeb
3. Ua ib qho kev tshuaj xyuas tshwj xeeb ntawm lub tshuab ziab khaub ncaws kom paub meej tias nws ua haujlwm zoo
4. Ua kom muaj zog ntawm - kev saib xyuas thiab tshuaj xyuas qhov chaw, thiab tsim kho cov kev ntsuas tam sim yog tias pom muaj kev phom sij zais cia
