ZT J系列螺旋桨是推进器用于制浆造纸工业作为卧式浆池的循环搅拌装置。以使纤维保持悬浮状态，保持纸浆的组成部分在浆料中均匀分布。
ZTJ series of Screw Propeller are used as cycle stirring devices for lying pulp and paper making industry to keep fiber in suspension and also well-distributed.
在机身中心上面安装一个三浆叶主螺旋桨。
The three-blade main rotor is mounted above centre of fuselage.
倒浆，把橹或桨向前推以阻止船向前运动或向后移动的一种划船或摇桨方式。
A rowing or paddling stroke in which the oar or paddle is pushed forward, used to check a boat's forward motion or move it backward.
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