Upper level: d2209 Undertaking multiple tasks, unspecified
Lower livel:
d2209w11 Accomplishment of work to require skill of process study and design
d2209w12 Accomplishment of work to require skill of installation and start of equipment
d2209w13 Accomplishment of work to require skill of monitor and driving and control
d2209w14 Accomplishment of work to require skill for maintenance and breakdown