How should you signal the crane operator to lower?
A
With forearm vertical and forefinger pointing up, move hand in small horizontal circles.
B
With arm extended downwards and forefinger pointing down, move hand in small horizontal circles.
C
Extend arm and point finger in the direction to move the boom.
D
Extend arm with thumb pointing downward, and flex fingers in and out.
E
İlgili Sorular
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