Description. The genus is hermaphroditic, having apetalous perfect flowers which are wind-pollinated. Elm leaves are alternate, with simple, single- or, most commonly, doubly serrate margins, usually asymmetric at the base and acuminate at the apex.The fruit is a round wind-dispersed samara flushed with chlorophyll, facilitating photosynthesis before the leaves emerge.
EPOXY低壓灌注法 此工法是以低壓低速的方式將環氧樹脂填補劑注入剪力牆體或樑柱裂縫內，待環氧樹脂硬化後並養護24小時，確保環氧樹脂已填滿縫隙且充分硬化後，再進行打磨。 環氧樹脂不僅能修補建築結構，也能避免內部鋼筋接觸水氣。
榆樹
