The two oscillator circuits down below are suited to making use of crystal oscillators in series or parallel method: Substantial-repetition-level and significant-electricity picosecond regenerative amplifier based on 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... https://bookmarkprobe.com/story19213650/not-known-details-about-bulk-crystal-oscillator