Arabidopsis Cor15am Is a Chloroplast Stromal Protein That Has Cryoprotective Activity

The present invention relates to a twin-bulb Christmas light bulb string of a curtain-type light bulb string. It mainly combines every two bulb-assemblies at a same level on the branch string to become a twin-bulb single body by a loop or the like for providing a special and different decorative effect. This obtains improvement and utility.