| 摘要 |
<p>A casing (11) for use in a freezing container is provided with a through hole (H) for insertion of the piping of a refrigerant circuit therethrough. Each opening end of the through hole (H) is covered over with a respective mesh sheet (31, 32). With each opening end of the through hole (H) covered over with the mesh sheet (31, 32), the tip end of a filling nozzle (33) is inserted until it reaches the middle of the through hole (H) and a sealant material is injected. The injected sealant material is held back within the through hole (H) by each mesh sheet (31, 32) and, with the progress of the injection of the sealant material, the air present in the through hole (H) is purged out through each mesh sheet (31, 32).</p> |
