The process involves replacing a key step in making conventional solar cells: screen printing.
这个过程包括制造传统太阳能电池不包括的一个关键步骤：丝网印刷。
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It was a small step from printing notes tomaking book entries crediting deposits of borrowers, which the borrowers inturn could "spend" by writing checks, thereby "printing"their own money.
Modular systems offering the option of increasing the number of colours step-by-step are ideally suited to today's changing transactional printing market.