It's a two - component , reinforced etch primer, containing phosphoric acid and corrosion - inhibitive pigments.一种含有磷酸和 防腐蚀 颜料的双组份加强型磷化底漆.OBJECTIVE To discuss the inhibitive activity of proteinase of hypoxic cells r...
marine biota海洋生物区They have had serious effects upon the biota of stream.它们对河流中的生物群体产生严重影响.regional biota区域性生物群The past decade has witnessed the discoveries of various important fossils from the Mesozoic Jehol Biota.摘要最近十...