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- soft wood tar pitch 针叶材焦油沥青,软材焦油沥青,松焦油沥青
- wood tar pitch 木焦油沥青
- Pine is a soft wood and teak is a hard wood. 松木是软木,柚木是硬木。
- hard wood tar pitch 硬材沥青
- soft wood tar 软材焦油
- The nail easily penetrated the soft wood. 钉子很容易地就穿透了软木材。
- A pitch mesophase can be prepared from petroleum pitch andcoal tar pitch. 从石油沥青和煤沥青中制取沥青中间相物质。
- Soft wood, such as spruce, aspen, or pine, used in making paper. 软木如针枞木、白杨或松木等用于造纸的软木
- Tall evergreen of Japan and China yielding valuable soft wood. 日本和中国的一种常绿高大树种,木质柔软。
- Soft wood,such as spruce,aspen,or pine,used in making paper. 软木如针枞木、白杨或松木等用于造纸的软木
- Mesophase microbeads were prepared from coal tar pitch by thermal condensation in atmospheric pressure. 以煤焦油沥青为原料采用常压热缩聚工艺制备中间相沥青微球。
- Carbon foams were prepared from coal tar pitch, petroleum mesophase pitch, and AR pitch. 分别以煤沥青、石油中间相沥青和AR沥青为前驱体制备炭泡沫材料。
- Soft wood damages easily. 软木容易损坏。
- The structure change of medium coal tar pitch(MCTP) during co-carbonization was investigated by using NMR. 使用一种工业重质油和中温煤焦油沥青进行共炭化反应,改善了煤沥青的炭化性质。
- The results show that coal tar pitch and terephthalic aldehyde can be used to synthesize COPNA resin. 结果表明,煤沥青能够与对苯二甲醛合成COPNA树脂,其反应机理为酸催化下的阳离子型缩聚反应;
- Any of various thick,dark,sticky substances obtained from the distillation residue of coal tar,wood tar,or petroleum and used for waterproofing,roofing,caulking,and paving. 沥青,人造沥青某种厚厚的、黑而粘的物质,由炭焦、木焦或石油的剩余物中提炼出来,用于防水、盖屋顶、填缝和铺路。
- Boron-substituted polyaromatic mesophase was prepared by co-pyrolysis of a coal tar pitch with pyridine-borane complex under autogeneous pressure. 以煤焦油沥青和吡啶硼烷为原料采用加压热缩聚工艺制备硼取代聚芳烃中间相沥青。
- Any of various thick, dark, sticky substances obtained from the distillation residue of coal tar, wood tar, or petroleum and used for waterproofing, roofing, caulking, and paving. 沥青,人造沥青某种厚厚的、黑而粘的物质,由炭焦、木焦或石油的剩余物中提炼出来,用于防水、盖屋顶、填缝和铺路
- Modification of coal tar pitch(CTP) as carbon materials was studied using 4-methyl benzaldehyde(4-MB) as modifier by an acid catalyst. 以对甲基苯甲醛(4-methyl benzaldehyde,简称4-MB)为改性剂,在对甲苯磺酸(PTS)的作用下对煤沥青进行了改性研究。
- Distilling the low temperature coal tar pitch before coking tests, get the pitch with different volatile at different temperature. 在炼焦实验之前,将低温煤焦油进行了蒸馏,通过不同的蒸馏温度得到挥发分不同的沥青。