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1·There were two types of code formats that used the same tube type codes, which were in use from 1948 until these companies stopped the manufacture of standard receiving tubes.

有两种格式的代码使用同一管类型代码，其中使用的是从1948年类型，直到这些公司停止接收管的标准制造。

2·You will need a vessel to heat water in, a source of heat, gauze or muslin, thread, a delivery tube, a receiving vessel and ice.

需要一个加热开水的容器、热源、沙布或棉布、线，导管、接收容器、冰。

3·The core tube assembly has an inlet for receiving solid material at a rear end and an outlet for discharging material at a forward end.

芯管组件具有在后端处用于接收固体材料的入口和在前端处用于排出材料的出口。

4·The monotube infrared transceiver circuit of the utility model can realize the functions of transmitting and receiving only through one infrared tube, with low cost and small structural space.

使用本实用新型所述的单管红外发射接收电路，通过只使用一个红外管便可实现发射和接收功能，成本低廉，所需结构空间小。