surface barrier
表面阻挡层光电晶体管 surface-barrier phototransistor
表面阻挡层晶体管 surface barrier transistor
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第二个难题是，在高的设计压力下，胎体和压力外套的不规则表面可能会导致阻挡层完整性的进一步复杂化。
Second, at the high design pressures required for these applications, the irregular surface of the carcass and pressure armor can cause further complications with the integrity of the barrier layer.
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