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| Check that tension between panel seal -1- and body -4- is uniform all around using a 0.3 mm thick strip of cardboard, for example, a business card (gap a = 0.3 mm). It must be possible to pull the paper strip through tightly between the panel seal and body. |
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| If the pre-tension is insufficient, the panel seal can be pushed apart with a wedge -3- or pushed together if the pre-tension is excessive. To adjust the panel seal, the glass panel -2- must firstly be removed. |
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