Abstract: About 720 transitions of CF$-3$/CFH$-2$/ molecule in the excited 3v$-18$/, v$-11$/ $PLU v$-18$/, and v$-17$/ states were measured in the frequency range between 49 and 142 GHz. Rotational and centrifugal distortion constants were derived from experimental spectra using Watson type Hamiltonian in the I$+r$/ representation.!7
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