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根据设备的技术要求设计了系统硬件和PLC应用软件，该系统已用于自制双丝电渣焊设备。

According to the specification of equipment, the hardware and PLC application software have been designed. This control system has been used in double wires electroslag welding.

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本文提出的一种双滑丝电阻式位移计，特别适用于动态大位移的测量，使用时无须从被测构件上引出导线。

Presented in this paper is a displacement meter of resistance type of slide on the double wire. This meter is specially suitable for the measurement of the large displacement due to dynamical effects.

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