class f fly ash造句

例句与造句

1. There are no specific requirements for the types of fly ash that may be used in flowable fill mixtures . " Low lime " or Class F fly ash is well suited for use in high fly ash content mixes, but can also be used in low fly ash content mixes . " High lime " or Class C fly ash, because it is usually self-cementing, is almost always used only in low fly ash content flowable fill mixes.
2. It's difficult to find class f fly ash in a sentence. 用class f fly ash造句挺难的