つつある => to be doing; to be in the process of doing ~ N2
つつある => In the middle of A; in the process of A N2
Time, Situation
からつくる/でつくる => made from; made with N4
~且つ(かつ) => and N1
Line up, list
つつ => while; even though; despite ~ N2
ひとつには…ためである => Partly because of ... N3
Cause, reason
つつ/つつも => While A, B. Although A (is beng done), B N2
Information, Report
につけ~につけ => each time, whenever, either way N2
あかつきには => After A then B N1
Time, Situation
べつに => separately N2
Description
つ~つ => Doing A and B (repeatedly, one after another) N1
Information, Report
[続「つづ」]ける => continues, to continue to N4
Secondary Verb