英语翻译我公司从上世纪80年代初期开始涉足建材行业,在石灰领域已有20多年的总承包历史,对建材施工经验的总结伴随着建材行业的发展.

Our company start business in building materials industry since early 1980s, with 20+ years experiences in general contracts in lime field, which accompanies the developing of building marterial industry.

Our company started to set foot in the building materials at early 1980s. And in the lime field, we have been doing overall contracts for over 20 years. The summary of the experience in the construction of the building materials goes hand in hand with the development of the building material industry.

From the early 1980s on, our company begain to get involved of building material industry, we have over 20 years general contracting history in lime field, also we keep on summarizing our experience in the construction materials area with the development of whole industry.
我感觉最后一句有点小别扭,翻译意思为：伴随着建材行业的发展我们也在不断总结经验.

My company has involved in building materials industrysince the early 1980, in lime field has more than 20 years of general contracting history, summed up the experience of the construction of building materials with the development of the industry of building materials.