单词：double check valve
double check valve的用法和样例：
例句
- DOUBLE CHECK VALVE ASSEMBLY For Low Hazard Cross-connections and continuous pressure applications.双止回阀总成用于低危险交叉连接和持续压力应用场合。
- A Double Check Detector Assembly shall be installed on fire protection systems when connected to a potable water supply.当消防系统连接到饮用水供应系统时，应该安装一个双止回阀总成。
单词：double check valve 相关文章
[00:00.00]Unit 17 At The Hotel [00:17.65]第十七单元 在旅馆 [00:35.29]Sentence Patterns [00:41.55]基本句型 [00:47.80]161 I'd like to book a single room with a shower [01:03.99]我想预定一个带淋浴的单人间 [01:20.17]162 I'd like
实用英语口语
Part One 你听不懂的 As clean as a whistle 非常洁净，清白，空的，灵敏的 The police tried to find evidence related to his criminal behaviour but he was as clean as a whistle. Mary rides on the horse and jumps over the barrier as clean as a whistle. Th
新东方语音语调视频讲解
have to 必须 reconfirm 就是re+confirm 所以有再一次确认的意思 你有可能听到的回答是： You must make a reconfirmation 48 hours ahead. 你必须48小时前再确认。 这个reconfirmation就是再确认的名词 reconfirm 这一词
英语口语
今天我们要学的词是double check。 Double check, 是复核的意思。The teacher told her students to double check their answers before handing in the exam, 老师告诉学生们，交卷之前应该反复检查自己的答案。They double
英语单词荟萃
今天我们要学的词是double check。 Double check, 是复核的意思。The teacher told her students to double check their answers before handing in the exam, 老师告诉学生们，交卷之前应该反复检查自己的答案。They double
英语每日一词
1、我要早上8：00设定电话叫醒。 I would like to have a morning call at 8:00 in the morning. 2、我要食物送到房间的服务。 I'd like to order room service, please.? 3、我要单人房。 I'd like a single room. 4、我要两张床
英语口语