目前使用的原条材积公式是1959年12月31日批准,1964年4月1日实施的原条材积公式(适用于所有树种,中央直径范围为6～50cm,长度范围为3～35m)。其公式为: The formula for the original bar volume currently used is the original bar volume formula (applicable to all tree species with a central diameter of 6 to 50 cm and a length of 3 to 35 m) approved on December 31, 1959 and implemented on April 1, 1964. The formula is: