一面有个灯, 另一面是个光感器, 血氧高就红
应该是跟自己比。
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Covid 期间买过一个$14。 有点担心测的不准。 想买一个好一点的。
-SNHmom2015-
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05/04/2025 postreply
15:48:28
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用不着。就这个就行。
-4657238-
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05/05/2025 postreply
13:15:48
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