A cigarette is still pluming in the ashtray.一支香烟仍在烟缸里吐着缕缕青烟.She hurled the ashtray across the room, narrowly missing my head.她用力把烟灰缸从房间那头扔过来，差点砸到我的脑袋。He knocked out his pipe in the big glass ashtray.他在大玻璃烟灰缸里磕净烟斗。I empti...
Use reducer special for plastic extruder with alloy hard - toothed surface.采用合金硬齿面塑料挤出机专用减速机.This article introduces simulation analysis methods of twin - screw extruder.本文介绍了双螺杆挤压机的模拟分析的方法.In the control system of new d...
你,无形地,呼唤着我.And your swan hands Were weaving me like two wings.环境资源为人类生存和发展提供天然矿物原料和自然条件, 它有形或无形地参与技术创新的整个过程.Thus, the Environment Resource plays a very key role in Technology Innovation visibly or invisibly....