New brush holders are to be from Dixie approvedmaterial and suppliers only.
刷 架的材料和生产厂家必须是迪克斯指定的。
2
The mattress and cushioning material used should be made of approvedmaterial.
床垫和缓冲材料应采用经认可的材料。
3
The floors of the bins shall be of concrete or other approvedmaterial having sufficient slope to ensure adequate drainage of aggregates before being used for concreting.