The linkage arrangement is completed by connecting the link to the lever at a third pivot connection.
通过在第三转动接头处使连杆连接于杠杆来构成连杆组装置。
The scheme number three is: a connection rod (12) is hinged between the lower lever (5) and the upper lever (7).
方案三是：下杠杆(5)与上杠杆(7)之间铰接有连杆(12)。
The scheme number three is: a connection rod (12) is hinged between the lower lever (5) and the upper lever (7).
方案三是：下杠杆(5)与上杠杆(7)之间铰接有连杆(12)。
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