| 摘要 |
<p>The device has a set of metal membranes and a set of openings (16, 17) provided in an upper part and a lower part of reinforcements (10). Another set of openings (18, 19) is provided in a lower side wall and an upper side wall (8). The openings are utilized for providing upward movement, and provide replacement of a liquefied natural gas with an inert gas consisting mainly of argon, lighter gas such as methane, or nitrogen that is optionally present in insulating spaces of plywood boxes.</p> |
