adj.無用的；不實用的；無益的

The surveillance radar is unserviceable. 監(jiān)視雷達不工作。

To damage threads to an unserviceable condition. 螺紋損壞后不可用。

Unserviceable due to excessive wear. 由于過度磨損而不可用。

The following essential approach aid is unserviceable with R/W 31 localizer. 必要的進場設(shè)備：31號跑道航道不工作。

This applies to the transport of both serviceable and unserviceable units. 可用件和不可用件的運輸也會遇到相同的問題。