常見例句雙語(yǔ)例句To reduce gamma ray background a cylindrical lead shield (100 mm thick) with a fixed bottom and movable cover shielded the detector.爲(wèi)了減少伽瑪射線背景圓柱底部固定和移動(dòng)蓋屏蔽探測(cè)器。 返回 gamma shield