故意设置在圆孔齿之间的少数其他形状的孔洞,称为“异形齿孔”。 世界上最早的异形齿孔是1867年澳大利亚昆士兰州邮票上的方形孔。1908年12月,美国邮票上出现狭长方形孔或2—5个大圆孔。 近年来,异形齿孔在我国开始受到重视,并在大量发行的普30上使用。在引进APS打孔机械(参见2000年第3期33页)后,我国具有推广应用异形齿孔的技术手段,并在国际上成为较多使用异形齿孔的国家。 A handful of other shaped holes deliberately set between the round hole toothing, known as “shaped hole.” The world’s earliest shaped perforation is a square hole on a 1867 stamp in Queensland, Australia. In December 1908, narrow rectangular holes or 2-5 large circular holes appeared on U.S. stamps. In recent years, shaped perforation began to receive the attention in our country, and in a large number of issued Pu 30 use. After the introduction of APS drilling machinery (see page 33 of 33), our country has the technical means of popularizing and applying the shaped perforation and has become a country that uses more shaped perforation in the world.