| 摘要 |
There is proposed a crane attachment (100) comprising movable arms (101) and a slide (102) which embeds the lateral linear motion of said arms, said attachment (100) comprising further <b>a laser pointer</b> (<b>200</b>) which allows the projection of the crane attachment (100) to be marked lineally on the ground, the crane operator to see the exact point where s/he will unload the material, and the material to be placed. |
