单语范例（未经PONS编辑处理）
Etching is also used in the manufacturing of printed circuit boards and semiconductor devices.
en.wikipedia.org Each of the 1662 printed circuit modules of the machine had a copper core and was clamped to the cooling bar.
en.wikipedia.org It is typically used with a flat coil that is part of a printed circuit board.
en.wikipedia.org The package may be through-hole mounted to a printed circuit board or inserted in a socket.
en.wikipedia.org The digital line card circuitry is mounted on a by (by) double-sided printed circuit board.
en.wikipedia.org