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Celsius degree symbol - temper...

128×128 636 165

Sigma - scientific symbol - Hi...

1200×450 1118 369

Sigma - sigma - No Watermark P...

1200×450 1983 611

Omega Symbol - scientific symb...

2093×1212 2833 587

Omega - scientific symbol - Lo...

539×658 3917 1032

Omega - physical constant - Tr...

958×562 1230 340

Micrometer Symbol - measuremen...

256×256 2598 732

micrometer symbol - measuring...

128×128 2794 790

Micrometer Symbol - length uni...

260×260 4362 943

DNA Double Helix Structure - s...

211×210 4597 1173