五月丁香综合啪啪成人小说,国产精品久久久久9999高清,公车上拨开丁字裤进入电影,亚洲一区二区女搞男

您好, 歡迎來到化工儀器網(wǎng)

| 注冊| 產(chǎn)品展廳| 收藏該商鋪

13816422470

business

首頁   >>   供求商機

Bunsen burner
  • Bunsen burner

貨物所在地:上海上海市

地: 上海市平?jīng)雎?625弄26號9

更新時間:2025-03-25 10:53:52

瀏覽次數(shù):1294

在線詢價收藏產(chǎn)品

( 聯(lián)系我們,請說明是在 化工儀器網(wǎng) 上看到的信息,謝謝?。?/p>

The company produces a series of Bunsen burner,it Is based on the requirements of various types of science laboratory, High quality materials, processed with advanced technology. Has heating efficient, uses safety but inexpensive advantages, Prices far below achieve equal quality levels imports product standards, that Is you choose Excellent ideal programs in Experimental equipment.
Bunsen burner () is one of the common temperature heating tools in Science Laboratory. The tool is named after Robert •  William • Bunsen. The inventor is his assistant Peter Desdega. He first made a paragraph heater. And Faraday improved it in 1855. can burn gas safely.
Flame will not be back into the gas supply pipe. Fuel is usually coal gas or natural gas, propane gas, etc.
Product Features:
can be used to heating the non combustible objects or solution. It can be used to heating the object to the high temperature. Maximum temperature is close to 1900 ° C.
Because the heating temperature higher than the alcohol lamp, Therefore, the lamp must be used more heat-resistant material of metal. Also, because its fuel is gaseous at room temperature.Use should pay special attention to the safety of pipelines. used to pay attention to use of safety. You must first check whether all the switches in the closed state before use it. Sure all switches are closed state, Can open master switch.
 

會員登錄

請輸入賬號

請輸入密碼

=

請輸驗證碼

收藏該商鋪

標簽:
保存成功

(空格分隔,最多3個,單個標簽最多10個字符)

常用:

提示

您的留言已提交成功!我們將在第一時間回復您~
在線留言

會員登錄

請輸入賬號

請輸入密碼

=

請輸驗證碼

收藏該商鋪

該信息已收藏!
標簽:
保存成功

(空格分隔,最多3個,單個標簽最多10個字符)

常用:
精品人妻av区乱码| 东北少妇不带套对白第一次| 浪漫樱花动漫在线观看免费| 阿娇被躁120分钟视频| 日本最大但人文艺术第一组| 日本台湾韩国三级在线播放| 国产色综合久久无码有码| 亚洲 日本 欧美 中文幕| 清纯校花粉嫩粗大进出好爽| 精东传媒vs天美传媒电影| 国产成人精品一区二三区在线观看| 中文字幕乱妇无码av在线| 国产激情久久久久影院老熟女| 久久综合99re88久久爱| 午夜成人影院| 国产成年无码av片在线| 初尝黑人巨砲波多野结衣| 搡bbbb搡bbb搡| 小13箩利洗澡无码视频免费网站| 亚洲精品乱码久久久久久中文字幕| 国精品无码人妻一区二区三区| 苍井空51分钟无删减毛片| 亚洲日韩精品无码专区网址| 国产综合在线观看| 成人在无码av在线观看一| 最近免费中文字幕中文高清6| 亚洲 欧洲 日产| 四川妇女BBBWBBBWM| 天天操天天干| 槽溜2021入口一二三四| JAPANESE日本熟妇| А√中文在线资源库| 美女脱个精光露出奶胸的照片视频| 99精品一区二区三区无码吞精| 三a级做爰片免费观看| 亚洲国产精品无码成人片久久| 小峓子的味道4| 中国少妇xxxx做受| 宁柔柔的小泬撑开到极致| 国产成人综合色在线观看网站| 顶级少妇做爰视频在线观看|