亚洲裸体视频,一级毛片在哪里看,国产素人在线,国产精品丝袜久久久,亚洲无砖砖区一二区免费,亚洲а∨天堂久久精品喷水,91网站在线播放

Main Products
Products Grade: P245
Specifications: φ18~32mm
Applied Standard:  agreement
Characteristics: P245 is used to produce big size PC Bar,which can be applied in highway and railway bridge、mine support and Dam construction.
Applications: Prestressed steelPC steelbar steel
Use of Products: This product has characteristics of reasonable chemical composition, high hardenability, good strength and toughness, good surface quality.