Vibrocorer
振动采样管
🗣️ 情景例句
But your L C must reach us 30 days before delivery.
但交货前30天，我们必须要收到你们的信用证。
I don't feel very well this morning.
我今早感到不很好。
He set up a fine example to all of us.
他为我们树立了一个好榜样。