Glyd Ring-Step Seal 格莱圈
step buffer seal 踏板缓冲器密封
step buffer seal assembly 踏板缓冲器密封总成
two-piece step type buffer seal 组合式阶梯型缓冲器密封
Step combination seal 阶梯组合封
·2,447,543篇论文数据,部分数据来源于NoteExpress
and Pembroke area there's a place, "the steps", that if you step on the seal,
在彭布鲁克区,有个地方叫“台阶”,如果你踏在了印记上,
布朗的学生们 - SpeakingMax英语口语达人
If a stable column of mud has been set up in the well, keeping the oil at bay through its sheer weight, the next step would be to set cement in the well and seal it off permanently.
ECONOMIST: Nerves are fraying a month after the Gulf of Mexico oil spill
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