The valve consists of an electromagnetic loop, a valve core, a replacement spring and a shell and the valve core consists of a retaining iron, a movable bar and a sealing pad. 它由电磁线圈、阀芯、复位弹簧和外壳组成,阀芯由挡铁,动杆和密封垫构成。
Spring variety had the highest chlorophyll content, biggest photosynthetic area, longest RSP and PAD ( photosynthetic active duration), and so did LSC ( leaf source capacity). 春性品种叶绿素含量高,光合面积大,功能高值期(RSP、PAD)长,叶源量(LSC)大。
⑶ To the traction wheels, wire rope, rope spring damping pad and the four variables for the study to conduct experimental research, in order to solve the vibration problem of the lift provides a theoretical and practical foundation. ⑶以曳引轮、钢丝绳、减振垫与绳头弹簧四个可变因素为研究对象进行了实验研究,为解决电梯振动问题提供了理论和实践基础。