?三角密封
... delta sand trap ==> 三角洲砂体圈闭 delta seal ==> 三角密封 delta signal ==> 半选输出信号差 ...
金属三角垫密封
橡胶三角垫密封
三角垫密封
Usually, it is only the Delta and Seal teams that get to do covert ops.
BBC: Snipers
By March 2005, he had completed his training and was assigned to SEAL Team 3, Delta Platoon.
CNN: Navy SEAL paid ultimate price to save buddies
He worried the troops would reject him because he had not served in any of its elite units such as the Army's Delta Force or the Navy's SEAL Team 6.
NPR: McChrystal Takes Blame For Rolling Stone Article
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。