The bolt of the utility model can only be tightened and fixed before the enclosing cover is fastened and can not be dismantled with any tool; therefore the burglar resistant property is more reliable.

本实用新型的螺栓只能在封盖扣紧前上紧固定，用任何工具都不能拆卸，所以防盗性能更可靠。

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For your reference, we are enclosing a few copies of leaflets, and will send you samples under separate cover.

兹随函附上几份说明书并另寄样品，供你方参考。

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We are enclosing the illustrated catalogues and latest price list, under separate cover, we are sending you a full range of samples at once.

随信附上带插图的目录册和最新价目表，另外品种齐全的样品我们将马上另寄。

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