| 摘要 |
The internal volume and surface area of the casing can be altered independently of the need for freedom of movement inside the casing, by dividing the latter into partially overlapping, nesting parts (A, B). The casing remains sealed when these parts are moved from a nesting position to an extended position, the maximum surface area being obtained in the latter position, which allows sufficient degree of freedom inside the casing for e.g. service work or refilling the ATM.
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