董土章、陈松华设计的“水泥袋切品刀”,中国专利局于1987年10月29日授予专利权(专利号:86206289)。目前建筑工地上,人们在开启水泥纸袋口时,往往用铁锹等工具将水泥袋铲破。这样不仅费力费时,而且水泥纸袋破损严重,影响回收使用,造成浪费。“水泥袋切口刀”为建筑工地开启水泥袋口提供一种理想的刀具。 Dong Tuzhang and Chen Songhua designed the “Cement Bag Cutting Knife”, which was granted by the Chinese Patent Office on October 29, 1987 (Patent No. 86206289). At present, on the construction site, people often use shovels and other tools to shovel cement bags when they open cement bags. This is not only time-consuming and time-consuming, but also the damage of cement paper bags is serious, affecting recycling and causing waste. “Cement bag cutting knife” provides an ideal tool for open cement bags in construction sites.