Please tied the air jacket well and fastened the motorcycle safety helmet before drifting, and don't loosen or unship them in the way.
漂流前穿好并系紧救生衣，戴好并扣紧安全帽，途中不得松开或解下；
Therefore, the tow feeding system was modified: enlarging air chamber in air jacket of the jet;
为此，对其供丝系统进行了技术改进：增大了喷嘴内外套间的气腔；
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