| 摘要 |
<p>GRAIN DOOR AND METHOD OF INSTALLATION: A grain door for installation across the doorway of a boxcar wherein a generally rectangular relatively stiff panel equipped with a plurality of horizontal straps is equipped with diagonal fold lines extending from the intersection of the side flap and floor flap fold lines to permit folding the side flaps and the floor flaps ends into overlying relation with the remainder of said panel to facilitate anchoring the straps to the doorway posts.</p> |
