用janitorial service造句子，“janitorial service”造句

These include indirect materials and indirect labor-- such as supplies, heat and light, maintenance and repairs, depreciation and insurance, taxes, rent, advertising and transportation, as well as clerical, legal and janitorial services.

It was not until one night, we were doing our clean up details (the military saves money on janitorial services by farming out its students to indentured servitude) that I got curious.