The pyrophyllite powder at very low price is used as the filler of brake composites to accommodate the frictional properties and markedly reduce the cost.

采用价格低廉的叶蜡石作为制动复合材料的填料，不仅可以调节制动材料的摩擦学性能，而且能够大幅度降低成本。

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Hardware suppliers, while having immediate commitments to one camp or the other, can, with some frictional cost, supply weapons to both sides.

FORBES: The Case For Endpoints

One is the frictional cost of running a system like this--paying the salaries of the tax lawyers, the lobbyists, the hardworking bureaucrats like Sciscioli.

FORBES: Magazine Article