Astatic 901, BLACK Portable Cardioid, Condenser Boundary Microphone.
无定向901，黑便携式心，电容边界麦克风。
The ASTATIC 901 is a superior low noise, electret condenser cardioid surface mounted boundary microphone.
在无定向901是一个卓越的低噪音，表面贴装电容式心形话筒的边界。
The magnetic properties as mentioned above were measured in a steady magnetic field by an astatic magnetometer designed by- ourself.
上述岩石磁性是由自行设计的静态测量方法，用国产的数字式无定向磁力仪测定的。
The magnetic properties as mentioned above were measured in a steady magnetic field by an astatic magnetometer designed by- ourself.
上述岩石磁性是由自行设计的静态测量方法，用国产的数字式无定向磁力仪测定的。
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