duty plate
1.By controlling the length-width ratio of grating electrode and the parameters of potential pulse,the alternated structure of the positive and negative ferroelectric domains,with the duty ratio of 1∶1,can be obtained on the crystal plate surface or in certain depth of the crystal,therefore the qusai-phase matching can be achieved.
2.The 60MN hot die forging hydraulic press, with weight 30% reduction of the main body compared with the traditional hydraulic press because of plate frame structure designed through new idea by adopting transverse pre-tightening technology mainly embodying the design and manufacturing level of the heavy-duty hydraulic presses at modem times, the first one with independent intellectual property right designed by China itself and a transverse pre-tightening plate-frame hydraulic press with max. tonnage in the world at present.
