The 2 oscillator circuits under are suitable for applying crystal oscillators in sequence or parallel manner: Higher-repetition-amount and higher-electric power picosecond regenerative amplifier based on an individual bulk Nd:GdVO4 crystal 中原子或分子的排列具有三维空间的周期性，隔一定的距离重复出现，这种周期性规律是 中原子或分子的排列具有三维空间的周期性，隔一定的距离重复出现，这种周... https://bookmarkssocial.com/story18892146/the-2-minute-rule-for-bulk-crystal-oscillator