How should you signal the crane operator to raise the boom and lower the load?
A
Extend arm with the palm down and hold this position rigidly.
B
Place both fists in front of your body with thumbs pointing toward each other.
C
Clasp hands in front of your body.
D
Extend arm with the thumb pointing up, and flex the fingers in and out for as long as the load movement is desired.
E
İlgili Sorular
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