the rigid structure and special design features of the rolling security shutter make it almost impossible to get in. how to answer phones, answer customer questions and technical training. doctors who call themselves catholic and practice in a manner that defies catholic teaching are wolves in sheep’s clothing. it is for these two reasons that we frequently have to address the proper use of one of our industry's most common tools. this wealth of knowledge ultimately led to the company’s strong growth in the electric sweeper market and helped bolster the hoover brand. 