These amplifiers have long been made with tiny election tubes.
这些放大器是用微型电子管制成的。
These amplifiers have long been made with tiny election tubes .
这些放大器是用微型电子管制成的。
From each of these amplifiers a final outlet cable runs at high level in the car park under each block.
从这些放大器每一个最终的出线电缆在运行，在各块停车场的高水平。
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