Clean wall area behind all bench area especially behind sinks and hotplates.

清理操作台后面的墙壁，特别是洗涤槽(洗手池)和炉灶后面的墙壁。

The system comprises metal -oxide-covered (SnO2) micro-hotplates and the necessary driving and signal-conditioning circuitry.

该系统包括金属氧化物覆盖(二氧化锡)微型热板、必要的驱动器及信号调节电路。