But the theoretical research of it is lagged the practice , so the use of it is still in the period of experience 但对塑料板排水法的理论研究远滞后于工程实践,塑料板排水法的使用还处于经验阶段。
Light transmitting profiled plastic sheeting for single skin roofing - part 1 : general requirements and test methods ; german version en 1013 - 1 : 1997 单层屋顶用反光型塑料板.第1部分:一般要求和试验方法
Glass textile reinforced plastics . preparation of sheets of thermosetting resins with unidirectional reinforcement for tensile test specimens 玻璃纺织物增强塑料.热固性树脂拉力试件单向增强塑料板的制备
Is a professional manufacturer which specilizes in producing various plastic sheets film , such as petg . pet . pc . pmma and multi - layer compound plastic sheets 万事杰塑料板材有限公司是一家专业生产塑料板片材的企业。
Pvc light transmitting profiled plastic sheeting for single skin roofing - part 3 : specific requirements and test methods for sheets of polyvinyl chloride ; german version en 1013 - 3 : 1997 单层屋顶用反光型塑料板.第3部分:聚氯乙烯