David: We bought 1000 sets of chemical instruments from you, but there are 40 not up to the standard.

大卫：我们从你处购买了1000套化学仪器，但是有40套是不合格产品。

youdao

These rings are applicable in uses on compressors, mechanical pumps, valves, chemical instruments and meters. etc.

用于压缩机、机泵、阀门、化工仪器、仪表等。

youdao

The consignments of chemical instruments have just reached us. We have to lodge a claim against you for inferior quality I am afraid.

我们刚刚已经收到化学仪器了，恐怕我们不得不就这些产品较差的质量向你方提出索赔。

youdao

In the years ahead, various groups, inclined to fanaticism, are likely to use chemical weapons as instruments of sabotage or terrorism.

CENTERFORSECURITYPOLICY: Treaties Alone Will Do Little

Rover scientists waited for data from rover instruments that measure the chemical composition of rocks.

NPR: Mars Rover Marks Second Anniversary of Landing

According to the American Chemical Society, nearly 100% of past winners in the prestigious Siemens Westinghouse Competition in Math, Science, and Technology (for high School students) play one or more musical instruments (The Midland Chemist (American Chemical Society) Vol. 42, No.1, Feb. 2005).

FORBES: 12 Days of Charitable Giving 2012: School of Harmony