Comment by theragra
17 hours ago
It is quite common, but not always. I, for example, even was doing GC/MS to check substance and purity. My friends listened to me about how to approach these things. So, quite common, ancdotically.
17 hours ago
It is quite common, but not always. I, for example, even was doing GC/MS to check substance and purity. My friends listened to me about how to approach these things. So, quite common, ancdotically.
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