Yuav ua li cas txheeb xyuas qhov kub thiab txias ntawm pe pipe jointing machine:
1) Nias "SET" rau ntau tshaj 3 vib nas this kom txog thaum "sd" tshwm nyob rau sab sauv qhov rais
2) Nias "∧" lossis "∨" hloov tus nqi kom tau teev tseg (nias"∧" lossis "∨" tsis tu ncua, tus nqi yuav ntxiv lossis rho tawm tau)
3) Tom qab teeb tsa, nias "SET" rov qab mus rau kev saib xyuas thiab tswj kev sib tshuam
