求翻译：为探究诸因素对签字笔笔痕的影响，本实验采用单一变量法，要求10位书写人使用9支不同品牌多种型号的签字笔书写了130份检材，并利用马蹄镜对检材进行初步地观察，寻找特征笔痕是什么意思？

To explore the impact of factors pen pen marks, the present study, the single variable method, the 10 written in 9 different brands of a variety of models of pen writing 130 samples, and horseshoe mirror samples preliminary observation to find the characteristics of pen marks

To explore factors of the signature pen pen marks, the lab with a single variable, and requires 10-bit write people use more than 9 different brands of the model 130 has been signed up pen for writing test materials, and use "horseshoe" to carry out the preliminary test is to observe, look for the c

In order to inquire into the various factorss to the signature pen pen mark influence, this experiment use the sole quantity method, requested 10 to write the human to use 9 different brand many kinds of models the signature pen to write 130 to examine the material, and to examined the material usin

To explore the influence of factors on pen marks, by this experiment was conducted in a variable, use 9 different brands require 10-bit write people have a variety of types of pen writing 130 samples, and Horseshoe mirror samples for initial investigation, looking for characteristics of trace

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