Letter box device
A letter box and placing slot technology, which is applied to devices and coatings that apply liquid to the surface, can solve problems such as low work efficiency, human harm, and adverse health, and achieve the effects of convenient operation and simple structure.
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[0013] Such as figure 1 , figure 2 and image 3 As shown, a letterbox device of the present invention includes a seat body 9, a roller 981 is mounted rollingly on the bottom end surface of the seat body 9, and a retractable arm 8 that expands forward and backward is fixedly installed on the front end surface of the seat body 9. One end of the arm 8 away from the base body 9 is fixedly equipped with a cross bar 81, the left and right ends of the cross bar 81 are covered with rubber sleeves 82, and the right top end face of the base body 9 is provided with a placement groove 91, so that A sinking cavity 95 is provided in the left top end surface of the seat body 9, and a first sliding groove extending downwards is provided in the top end surface of the seat body 9 between the sinking cavity 95 and the placement groove 91. 93, the inner wall of the seat body 9 at the bottom of the placement groove 91 is provided with a first cavity 92 at the left end communicating with the ext...
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