Before revision: while an FJH131 is a quadruple 2-input NAND gate (like the 7400), an FCH131 is a dual 4-input NAND gate, and an FLH131 is an 8-imput NAND gate (equivalent to 7430).
After revision: while an FJH131 is a quadruple 2-input NAND gate (like the 7400), an FCH131 is a dual 4-input NAND gate, and an FLH131 is an 8-input NAND gate (equivalent to 7430).