Three major series: 1, Vol Cold Spring, 2, coil spring, 3, steel spring.
主要有三大系列: 1, 冷卷弹簧, 2, 热卷弹簧, 3, 钢片弹簧.
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The two primary types of pressure plate assemblies are coil spring assembly and diaphragm spring.
有两个基本类型的压盘是螺旋弹簧组压盘和膜片弹簧压盘.
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Every four weeks, reactivation of coil spring is performed and ulceration of oral mucosa is recorded.
每隔四周检查及活化弹簧一次,并纪录口腔组织有无溃疡现象.
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