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産業機器 Durst LABORATOR 184のPDF 取扱説明書をオンラインで閲覧またはダウンロードできます。Durst LABORATOR 184 18 ページ。 Counter-weight spring adjustment

WARNING!
DO NOT ATTEMPT TO CARRY OUT THE SPRING ADJUSTMENT
ALONE!
SPRING ADJUSTMENT IS A TWO-PERSON JOB.
If this person continues the travel of the tool in a downwards direction the force
of the spring will make the enlarger travel in the direction of the red arrow, it will
pull you of the ladder and possible hit you in the head with the end of the tool.
NEVER STAND IN THE LINE OF TRAVEL OF THE TENSION TOOL.