您要查找的是不是：
- 声速仪sound velocity meter
- 表层声速仪surface sound velocity meter
- 环loop
- 精密声速仪Precise sound velocity instrument
- 鸣to cry (of birds)
- 仪present
- 环比link relative ratio
- 精密声速仪及其逻辑仿真Precise Sound Velocity Instrument and Its Logic Simulation
- 圆环traffic circle
- 鸡鸣crow
- 环的annular
- 环氧epoxy
- 应用声速仪对测深仪改正精度的测试The Correction Accuracy Test of Echo Sounder with Sound Velocity Profiler
- 蜂鸣singing
- 环氧乙烷epoxy ethane
- 检测仪surveymeter
- 声速velocity of sound
- 环己hexanaphthene
- 测量仪admeasuring apparatus
- 外环outer ring
