Complex sentence: One reduced the effects of vibration in correlation to temperature change, the other increased the pulse rate for 2 to 6 μsec and began utilizing a crystal oscillator for more stable readings and accurate accounts of movement within the air.
Split into simpler sentences: One reduced the effects of vibration in correlation to temperature change, the other increased the pulse duration from two to six microseconds. It also began using a crystal oscillator for more stable readings and accurate accounts of movement within the air.