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Subject: (sensor) jack Measure the distance from the top edge of the level to the stringline and compare with the grade offset that the stringline was set by. Adjust as necessary by turning the sensor jack crank clockwise to raise the machine or counterclockwise to lower the machine.И почти сразу Place the bubble level on the front height tab on the mold and adjust the front grade sensor jack until the distance from the bubble level to the stringline is equal to the distance measured at the rear height tab. Что здесь "jack"? Спасибо.
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