...温下变脆:the majority of poor low-temperature-resistant plastic, low temperature embrittlement ⑨容易老化:easy to aging ⑩某些塑料易溶于溶剂:some plastics soluble in solvents. .
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But it is easy to aging in the air, the heat variable viscosity, easy expansion in mineral oil or gasoline and dissolved, but not resistant to acid alkali.
但在空气中易老化，遇热变黏，在矿物油或汽油中易膨胀和溶解，耐碱但不耐强酸。
After the phone is fully charged, the long-term do not unplug the charger, easy to aging charger, resulting in security risks, and even fire, explosion, accidental electric shock and other accidents.
手机充完电后，长期不拔充电器，容易让充电器老化，造成安全隐患事故，甚至发生火灾、爆炸、意外触电等事故。
Experts say aging bus parts and accessories are easy to catch fire.
专家指出，巴士起火与车龄大、零件老化有密切关系。
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