The ÖBB narrow-gauge braked (hand-operated) water tank cars serve on the Mariazeller line. These cars do not have a continuous vacuum brake line. A couple of water tank cars and a spray wagon form a weedkilling train. The weedkilling train is usually parked on a dead-end track in the area of Ober-Grafendorf. The water tanks are oil tanks formerly used on standard-gauge tenders, the underframes have been converted from retired narrow-gauge rolling stock.|
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