他们同样面临来自纸浆和造纸工厂对于原木订购配额的下降，原木削皮需求的降低，原木段出口的下滑和贷款要求的提高。
They also face falling roundwood quotas from pulp and paper factories, slowing peeler log demand, declining sawlog exports and increasing difficulty securing lines of credit.
而人造桥则是由切段原木或是厚木板、石头搭建起来并用横梁做支撑的拱。
The first Bridges made by humans were probably spans of cut wooden logs or planks and eventually stones, using a simple support and crossbeam arrangement.
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