A.4~6mm B.6~9mm C.25~30mm D.10~24mm
A.3%~8% B.5%~10% C.0.2mm~0.6mm D.0.3mm~0.7mm
A.硼酸 B.磷酸氢二钠 C.苯甲酸钠 D.山梨酸