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HPC has been referred to as " engineered concrete , " implying that an HPC mixture is not specified in a generic recipe , but rather designed to meet project-specific needs [ 1 ] . " " Operational " - not policy-aspects of air operations against NVN were the main points of discussion , with attention centered on the effect of pressures in Laos , preparatory steps necessary for a Laotian contingency and probable repercussions . " In the printing industry , we understand that the term " minor servicing " includes , among others , tasks such as clearing of certain types of paper jams ; minor cleaning , lubricating and adjusting operations ; certain plate and blanket changing tasks ; and , in some cases , paper webbing and paper roll changing . Generally speaking , " minor servicing " is considered to include those tasks involving operations which can be safely accomplished by employees and where extensive disassembly of equipment is not required . Some have predicted " clever contracts " with service performance clauses , rewards and penalties based on performance , equipment availability or document completion . As " commodity-producing peasants , " ( Cook 1984 ) they move in and out of capitalist systems depending upon the context of the situation to maximize their personal position and that of their household .