25169010 (01/1988-12/1999) Porphyry, syenite, lava, basalt, gneiss, trachyte and similar hard rocks n.e.s., merely cut, by sawing or otherwise, into blocks or slabs of a square or rectangular shape, of a thickness of <= 25 cm
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25169010 (01/1988-12/1999) Porphyry, syenite, lava, basalt, gneiss, trachyte and similar hard rocks n.e.s., merely cut, by sawing or otherwise, into blocks or slabs of a square or rectangular shape, of a thickness of <= 25 cm
