To control stepping motors, the balance bridge power drive circuit is made up by TDA1521 integrated audio power amplifier, the pulse allotter is made up by the parallel ports of computer and latches.

双回转构的步控制路由TDA1521音频集成功率放大组成平桥式功率驱动路，由计算并行口经过构成脉冲分配。

To control stepping motors, the balance bridge power drive circuit is made up by TDA1521 integrated audio power amplifier, the pulse allotter is made up by the parallel ports of computer and latches.

双回转机构的步进电机控制电路由TDA1521音频集率放大器率驱动电路，由计算机并行口经过锁存器构脉冲分配器。

To control stepping motors, the balance bridge power drive circuit is made up by TDA1521 integrated audio power amplifier, the pulse allotter is made up by the parallel ports of computer and latches.

双回转机构的步进电机控制电路由TDA1521音频集成功率放大器组成平桥式功率驱动电路，由计算机并行经过锁存器构成脉冲分配器。

To control stepping motors, the balance bridge power drive circuit is made up by TDA1521 integrated audio power amplifier, the pulse allotter is made up by the parallel ports of computer and latches.

双回转机构的步进机控制路由TDA1521音频集成大器组成平桥式驱路，由计算机并行口经过锁存器构成脉冲分配器。

To control stepping motors, the balance bridge power drive circuit is made up by TDA1521 integrated audio power amplifier, the pulse allotter is made up by the parallel ports of computer and latches.

双回转机构的步进电机控制电路由TDA1521音频集成功率放大器组成平桥式功率驱动电路，由计算机并行口经过锁存器构成脉冲分配器。

To control stepping motors, the balance bridge power drive circuit is made up by TDA1521 integrated audio power amplifier, the pulse allotter is made up by the parallel ports of computer and latches.

双回转机构的步进电机控制电路由TDA1521音频集成功率放大器组成平桥式功率驱动电路，由计算机并行口经过锁存器构成脉冲分配器。

To control stepping motors, the balance bridge power drive circuit is made up by TDA1521 integrated audio power amplifier, the pulse allotter is made up by the parallel ports of computer and latches.

双回转步进电控制电路由TDA1521音频集功率放大器组平桥式功率驱动电路，由计算并行口经过锁存器分配器。

To control stepping motors, the balance bridge power drive circuit is made up by TDA1521 integrated audio power amplifier, the pulse allotter is made up by the parallel ports of computer and latches.

双回转机构的步进电机控制电路由TDA1521音频集功率放大器组平桥式功率驱动电路，由算机并行口经过锁存器构脉冲分配器。

To control stepping motors, the balance bridge power drive circuit is made up by TDA1521 integrated audio power amplifier, the pulse allotter is made up by the parallel ports of computer and latches.

双回转步进电控制电路由TDA1521音频集功率放大器组平桥式功率驱动电路，由计算并行口经过锁存器分配器。

To control stepping motors, the balance bridge power drive circuit is made up by TDA1521 integrated audio power amplifier, the pulse allotter is made up by the parallel ports of computer and latches.

双回转机构的步进电机控制电路由TDA1521音频集成功率放大器组成平桥式功率驱动电路，由计算机并行口经过锁存器构成脉冲分配器。