Under the traditional color code, which refrigerant cylinder is rose (pink)?
a.R-410A
b.R-22
c.R-12
d.R-134a
解析
R-410A cylinders are traditionally colored rose (pink), which distinguishes them from light-green R-22, light-blue R-134a, and white R-12. Because R-410A operates at much higher pressures than R-22, using the correct refrigerant and gauges matters for safety. As always, the printed label is the authoritative identification, not the color.
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