The 2 oscillator circuits down below are ideal for making use of crystal oscillators in series or parallel mode: High-repetition-level and superior-electric power picosecond regenerative amplifier determined by just one 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... https://www.hxcrystals.com/seokeywords/bulk-crystal-oscillator.html