Roland DWX-50 Setup & Maintenance Manual page 14

To Ensure Safe Use
Important notes about the end (cut edge) of the air hose
Failure to observe these cautions may result in air leakage or easy dislodgement of the air hose.
Also, when a hose has been detached, cut off the end before reattaching the hose.
Ensure that it is not crushed.
Make the cut edge straight. Keep free from damage or soiling.
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