mechanical pencil lead ; automatic pencil lead
... pentel派通铅笔芯 pentel自动铅笔芯 people辣椒 ...
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自动铅笔芯 propelling pencil
自动笔铅芯 Polymer Leads
红色和自动铅笔笔芯 red and mechanical pencil lead
同学开始写了，大家都一直在写，可是小孩的自动铅笔芯不停断掉。
His classmates began to write, but the lead inside child's mechanical pencil kept broken.
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