CHC is a state-owned backbone enterprise directly under the administration of central government.

中国昊华化工（集团）总公司是中央管理的国有骨干企业。

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Over Unicom's backbone network, original SDH loop network architecture already fails to meet present capacity requirement, which must be transformed into ASON, especially for the central-east regions.

在联通的干线网上，原有的SDH环网结构已经不能满足当前的容量要求，必须改造成ason网络，特别是中东部地区。

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Most factories today have an entirely new generation of workers, very different from the old guards of the public sector that was the backbone of central trade unions.

FORBES: India

For one thing, the companies that make up the backbone of the economy, the small and middle-sized ones, most of them in central and northern Italy, are remarkably buoyant.

ECONOMIST: A survey of Italy