各有关联系人同志:《光电光谱分析》、《邮票上的光谱学和化学史》等书刊是我们编辑出版的两套丛书(外一本),如果你认为对你有参考价值的话,可以赠送你两套又一本,或其中一套或一本(邮资自付,可用邮票支付),有意者可来信告知收件人和详细地址,同时将邮票放在挂号信中寄来。 Relevant contact comrades: “Optical Spectrum Analysis”, “History of Spectroscopy and Chemistry on Stamps” and other books are two books compiled and published by us (one out of two), and you can donate if you think it is of reference value to you You have two or more sets, or one or a set (postage pays, can be used stamps), interested persons can write to the recipient and address details, at the same time the stamps sent by registered mail.