The design service life is based on the precondition of G-L Layer failure not occur, on the normal condition of balanced operation and routine maintenance.

The process diagnosis for synthesizing reaction of N-acetyl-L-cysteine (NAC) was established by thin layer chromatography (TLC) and TLC-scanning.

In this paper, layer paracompactness of L -Fuzzy subsets is redefined in L -Fuzzy topological spaces.