Take, for instance, these precast concrete beams.

以这些预制混凝土梁为例。

Bringing precast bridge segments to market will take a bit longer, as more rigorous certification is involved.

将预制桥梁部分推向市场需要更长，因为涉更严格。

The result is a frame that acts as a skeleton for precast concrete sections which can then be assembled into a bridge.

结果是一个框架作为预制混凝土部分骨架，然后可以组装成一座桥。

With precast products like pavers and blocks, you might shoot steam into the curing chamber to try to accelerate the curing process.

对于摊铺机和砌块等预制产品，您可以将蒸汽喷射到固化室中以尝试加速固化过程。