Black-black sensing element is a carrier catalytic element for the detection of 0 ~ 4% methane in air.

黑黑元件是用来检测空气中0 ~ 4%甲烷气体的载体催化元件。

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Black-black sensing element is a carrier catalytic element for the detection of 0 ~ 4% methane in air.

黑黑元件是用来检测空气中0 ~ 4%甲烷气体的载体催化元件。

youdao