Kuwongolera kwapamwamba kwa phenolic board kumayendetsedwa mu ulalo uliwonse Kuzindikira kwapakati pa phenolic resin Kutsimikizika kwatsatanetsatane kwa phenolic board pakupanga Post kupanga kukula kwa phenolic board Kuyesa kwa gulu la phenolic board performance Kuyesa kwa gulu la phenolic board performance Kuyesa kwa gulu la phenolic board performance