The mattress is best on a solid bed base.
床垫最好放在结实的床座上。
The conveying cause of natural food material cannot develop into solid-bed and melting-poor condition.
高分子物料在挤出加工过程中，难以形成明显的固体床和熔池。
The conveying cause of natural food material cannot develop into solid-bed and melting-poor condition.
高分子物料在挤出加工过程中，难以形成明显的固体床和熔池。
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