The Russo-Japanese War was from 1904 to 1905. According to wikipedia, the fledgling Japanese military consistently attained victory over the Russian forces arrayed against them, which was unexpected by world observers. I extracted and colored this image from a picture illustrating a story written by Adachi Kinnosuke in The Washington Times, April 24, 1904. Without a question, this image is in the public domain.
日俄戰爭戰鬥人員
combatants、flag、imperial japan、japan、russia、sword、war
戰鬥、旗、日本帝國、日本、俄國、劍、戰爭
資料來源：openclipart ( https://openclipart.org/ )

A plastic ruller used for measuring.
直尺（直尺）
artykuÅ‚y szkolne、instrument、linijka、measure、miara、przybory、realistic-under-100K、ruler、school、supply
學校文章、儀器、統治者、測量、測量、餐具、逼真的下-100K、統治者、學校、供應
資料來源：openclipart ( https://openclipart.org/ )

Epiphone black Flying V guitar
飛V黑色吉他
black、electric guitar、epiphone、flying v、goth、guitar、Instruments
黑色、電吉他、的Epiphone、飛行、戈特、吉他、儀器
資料來源：openclipart ( https://openclipart.org/ )

coloured line art trousers
褲子 - 有色
AFA Clothing、clothes、clothing、hose、kleidung、line art、outline、small printable school cliparts、trousers
AFA服裝、衣服、服裝、軟管、服裝、線條藝術、大綱、小型可打印學校教具、長褲
資料來源：openclipart ( https://openclipart.org/ )

A line drawing of a flowing ribbon.
流動的絲帶
banner、Encouraging、flow、flowing
旗幟、鼓舞人心的、流、流動
資料來源：openclipart ( https://openclipart.org/ )

An organic-style clipart flower.
卡通花
flower、gif、nature、Nature
花、GIF、性質、性質
資料來源：openclipart ( https://openclipart.org/ )

A gold cross.
金十字架
Christ、Christian、Cross、Crucifix、Divine、God、Gold、Jesus、Messiah、Religion
基督、基督教、交叉、十字架、神聖、神、金、耶穌、彌賽亞、宗教
資料來源：openclipart ( https://openclipart.org/ )

Two people talking near a green blackboard. E=mc² formula written on a blackboard. One person is standing and listening. The other person is pointing to the blackboard.Silhouttes of the people are also available separately.
黑板附近的人
blackboard、cartoon、colour、discussion、education、formula、inkscape、people、school、science、students、talk、two
黑板、動畫片、顏色、討論、教育、式、Inkscape中、人、學校、科學、學生們、談論、二
資料來源：openclipart ( https://openclipart.org/ )

A colored version of sheikh_tuhin's excellent racing car without shading.
深藍色賽車（頂視圖）
blue、car、dark、game、game sprite、Perfect Art、racing、racing car、simple、simple car、sprite、Top View Cars、transport、transportation、travel、video game、video game art
藍色、汽車、暗、遊戲、遊戲精靈、完美的藝術、賽跑、賽車、簡單、簡單的車、精靈、頂視圖汽車、運輸、運輸、旅行、電子遊戲、電子遊戲藝術
資料來源：openclipart ( https://openclipart.org/ )

gold star created by the image uploaded by ensarija
金星
collection1、FAVE、Gold star、star
collection1、FAVE、金星、星
資料來源：openclipart ( https://openclipart.org/ )