| 摘要 |
A double walled tank ( 12 ) is provided which includes an outer shell ( 14 ), a telescopically interfitted inner shell ( 16 ), and a cover ( 18 ) secured to outer shell ( 14 ). The tank ( 12 ) includes at least one spacer ( 48 ) located between the inner and outer shells ( 16, 14 ), as well as resilient seals ( 38, 72 ) serving to maintain an appropriate and safe spacing gap between the shells ( 14, 16 ). The inner shell ( 16 ) includes a top wall ( 38 ) equipped with a fill opening ( 52 ) defined by an upstanding central flange ( 50, 50 a) surmounted by a detachably secured cover ( 54, 54 a).
|
