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to phrases
expansion gap
auto. 膨胀伸缩间隙
met. 膨胀伸缩缝; 胀隙
railw. 伸缩缝
tech. 膨胀缝; 伸缩间隙
expansion gap: 5 phrases in 4 subjects
Bridge construction1
Construction1
Refrigeration1
Technology2