If an indicating thermometer is scaled only in Celsius or dually scaled in Celsius and Fahrenheit, it shall be accurate to " 1.8 F (1 C).
(an indicating thermometer; is scaled; ) (an indicating thermometer; dually scaled; L:in Celsius and Fahrenheit) (it; shall be; accurate to " 1.8 F)
an indicating thermometer an indicating thermometer it
is scaled dually scaled shall be
L:in Celsius and Fahrenheit
accurate to " 1.8 F