Plastics piping systems for buried and above-ground drainage and sewerage under pressure - Unplasticized poly (vinyl chloride) (PVC-U) - Part 1: specifications for piping components and the system.
地下和地上排水和排污用塑料压力管道系统。未增塑聚氯乙烯(PVC- U)。第1部分:管道件和系统规范。
I got 16 in O level exam. I will study Accountancy in Nan Yang Poly. Mr. Xu, Thank u for teach me Maths and English.
我“O”水准五科总分为16分,我将选择新加坡南洋理工学院专业。徐先生,谢谢你辅导我的英语和数学。
I got 16 in O level exam. I will study Accountancy in Nan Yang Poly. Mr. Xu, Thank u for teach me Maths and English.
我“O”水准五科总分为16分,我将选择新加坡南洋理工学院专业。徐先生,谢谢你辅导我的英语和数学。
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