求翻译：（3）在未开动电机前应先用手拔动弹性联轴器，观察偏心轮连杆及腭板的各关节活动情况，如发现不灵活卡住现象应设法消除之。是什么意思？

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( 3) not switch on the motor should be considered before hand with flexibility, observer eccentric clutch round plate connecting rods and cleft palate, such as found in the joints are not flexible stuck should seek to eliminate the phenomenon.

(3) in has not started in front of the electrical machinery to be supposed to use the hand to pull out the kinematic elasticity shaft coupling first, observes the eccentric connecting rod and e the board various joints activity situation, if the discovery catches the phenomenon to be supposed not ni

(The 3) cannot stir by hand before starting motor flexible coupling, observation of crank rod and palatal plate joints, if inflexible stick should be addressed.

(The 3) cannot stir by hand before starting motor flexible coupling, observation of crank rod and palatal plate joints, if inflexible stick should be addressed.