A method to detect vacuum degree using crystal resonator had been investigated, and resonant frequency of crystal resonator could be stabilized after two days agingtest at least.
研究了一种利用晶振测量 真空度的方法，经试验，至少经两天老化后晶振的共振频率才能稳定；
2
After the stated conditions of aging, impact test, the sample doesn't crack or brittle fracture.
光纤槽道能承受规定条件下的老化、冲击试验。试验后，试样不产生裂纹或脆断；
3
The results showed the loss rates of stress, initial modulus and breaking work were more than 44%, 65% and 51% after hydrothermal agingtest respectively;