Welding seam performed in prefabrication shop denote with "s".

在预制厂焊接的焊缝，用“S”表示。

Our piping prefabrication workshop covers a total area of 1000m2.

我们的管道预制加工厂拥有一千平方米的面积。

Prefabrication helps control quality and cost, and future mass production.

预制房屋构件有助于控制品质与成本和实现未来的大规模生产。

Superstructure assembly of prefabrication is new technique of ship building.

上层建筑整体吊装是船舶建造中一项新工艺。

The meanings of factory prefabrication of petrochemical pipes were expounded.

阐述了石油化工管道工厂化预制的意义。