这时只要将嚼过的口香糖，平整压贴粘于章面上，就能彻底粘起赃污，维持图章面的清洁。
What is to be done?As long as you press chewed gum on the surface of the seal flatly, it can clear dirt thoroughly and keep seal clean.
第二章先介绍了生物幼体保压取样器的总体结构。
In chapter 2, we first introduce the overall structure of the biological larvae pressure-retained sampler.
第七章分析了天然气水合物保温保压取样器的结构和工作原理。
In chapter 7, the structure and the working principle of the gas hydrate temperature-hold and pressure-tight sampling corer are discussed.
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