百度彩票
<tr id='OcWiPj'><strong id='OcWiPj'></strong><small id='OcWiPj'></small><button id='OcWiPj'></button><li id='OcWiPj'><noscript id='OcWiPj'><big id='OcWiPj'></big><dt id='OcWiPj'></dt></noscript></li></tr><ol id='OcWiPj'><option id='OcWiPj'><table id='OcWiPj'><blockquote id='OcWiPj'><tbody id='OcWiPj'></tbody></blockquote></table></option></ol><u id='OcWiPj'></u><kbd id='OcWiPj'><kbd id='OcWiPj'></kbd></kbd>
光学斩波器能够对内部频率电子合成器进行相位锁控，从而保证稳定性和弹
性伸缩性；各种斩波器频率范围从4Hz到6.4KHz。
