valve flap can all be made of metal can also be embedded in the metal on leather, rubber, or synthetic coverage, depending on the use of performance requirements.
阀瓣可以全部用金属制成,也可以在金属上镶嵌皮革、橡胶、或者采用合成覆盖面,这取决于使用性能的要求。
block proof cover can be made of metal or widely used pvc plastic, the structure is simple for the convenience of installation.
防堵罩可采用金属或使用广泛的pvc塑料制造,结 构简单,安装方便。
the reinforcing member may be made of metal or a carbon composite material.
加强件可由金属或碳纤维复合材料材料制成。
the plastic bag support rack is characterized in that the frames (1), (2) can be made of metal material or nonmetal material.
塑料袋撑架特征是框架(1)、(2)可由金属或非金属材料制成。
said invention is simple in structure, easy to use, and can be made of metal or plastics, and can correct the writing posture holding pen in time and can reduce fatigue produced by long-time writing.
另外,本发明可以由金属或塑料等材料制成,原料来源广泛,加工制作容易成本低廉。
the top and bottom ends of the containers may be made of metal or plastic.
在容器的顶部和底部的材质可为金属或塑料制成。