Meanwhile, three different wet contact acid processes are compared.
并对三种不同技术进行了比较。
Use hook-and-loop that has adhesive on the back side, as wet contact cement and hook-and-loop don't mix well.
使用钩和环已胶粘剂对背面，作为湿接触水泥及钩和闭环不要混淆。
After hours in the cold and wet, he reached inside and pulled the wallet out hoping to find some ID so he could contact the driver, only to discover it contained £400 in notes, with another £50 in spare change beside it.
他在又冷又湿的天气里呆了几个小时，于是伸手取出钱包，想能找到身份证，以便与司机取得联系，结果却发现钱包里装着400英镑钞票，旁边还有50英镑的零钱。
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